Skip Navigation LinksCAHAN

office of communications

California Health Alert Network (CAHAN)

The California Health Alert Network (CAHAN) is the official public health alerting and notification program for California, CAHAN is designed for emergency preparedness information sharing, distribution of pertinent public health related events and alerting materials, dissemination of treatment and prevention guidelines, coordinated disease investigation efforts, preparedness planning, and other initiatives that strengthen state and local preparedness. The priority health communication distribution through the health communication system is ranked into four different levels using the below levels of communications based on the noted definitions. 

Enrollment is limited to administration and select staff with emergency preparedness roles in State Agencies, Local He​​alth Jurisdictions and California Department of Public Health (CDPH) licensed Health Care Facilities.  

Please visit th​is link for more information and details on enrolling: CA​HA​N Alert System - FAQs (everbridge.net)   ​​​

Level of communication types:


Alert:Conveys the highest level of importance; warrants immediate action or attention. 

Advisory: Provides important information for a specific incident or situation; may not require immediate action. ​


Update: Provides updated information regarding an incident or si​tuation; unlikely to require immediate action along with general information that is not considered to be of an emergent nature. 






Other Health Advisories:
  • All Facilities Letters - ​An All Facilities Letter (AFL) is a communication from the Center for Health Care Quality (CHCQ), Licensing and Certification (L&C) Program to health facilities that are licensed or certified by L&C. The information contained in the AFL may include changes in requirements in healthcare, enforcement, new technologies, scope of practice, or general information that affects the health facility.
  • Healthcare-Associated Infections Program - CDPH health communications sent through the system by the HAI Program. 
  • Centers for Disease Control (CDC)National Health Alert Network (HAN) is CDC’s primary method of sharing cleared information about urgent public health incidents with public information officers; federal, state, territorial, tribal, and local public health practitioners; clinicians; and public health laboratories
  • Policy Alerts​ - CDPH Policy alerts include the latest guidance and policy updates from CDPH, which may include updates to the California state public health officer orders, public health mandates related to COVID-​19, Mpox, and other topics and resources. Fill out the CDPH Pol​icy Alert Registration form to sign up and receive these updates weekly ​​
    • ​​​​​Fatality from Lead Poisoning Linked to Use of Hemorrhoid Ointment from Vietnam​

      CDPH/Health Advisory-April 9, 2024- The California Department of Public Health is issuing this Health Advisory to notify health care providers, laboratories and public health departments that a woman in Sacramento developed severe lead poisoning and died in March 2024 after using a hemorrhoid ointment from Vietnam called, Cao Bôi Trĩ Cây Thầu Dầu. The woman purchased the product on Facebook and a relative in Vietnam shipped it to the U.S. Testing of the product found that it contained 4% lead (39,000 ppm), a highly dangerous amount of lead. If healthcare providers have patients that have used this hemorrhoid ointment, urge them to stop using it and order a venous blood lead level (BLL) test immediately. Contact California Poison Control at 1-800-222-1222 for clinical guidance on lead poisoning. See Health-Based Guidelines for BLL in Adults for specific recommendations based on the patient's BLL results.​​

    • ​​​​Highly Pathogenic Avian Influenza A(H5N1) Virus: Identification of Human Infection and Recommendations for Investigations and Response​​​

      CDC/Health ​​Advisory - April 5, 2024 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to inform clinicians, state health departments, and the public of a recently confirmed human infection with highly pathogenic avian influenza (HPAI) A(H5N1) virus in the United States following exposure to presumably infected dairy cattle. The U.S. Department of Agriculture (USDA) recently reported detections of highly pathogenic avian influenza A(H5N1) virus in U.S. dairy cattle in multiple states. This Health Advisory also includes a summary of interim CDC recommendations for preventing, monitoring, and conducting public health investigations of potential human infections with HPAI A(H5N1) virus.​

    • Increase in Invasive Serogroup Y Meningococcal Disease in the United States​​​​

      CDC/Health Advisory – March 28, 2024 – The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to alert healthcare providers to an increase in invasive meningococcal disea​se, mainly attributable to Neisseria meningitidis serogroup Y (Figure). As of March 25, 2024, 143 cases have been reported to CDC for the current calendar year, an increase of 62 cases over the 81 reported as of this date in 2023. A specific meningococcal strain, sequence type (ST) 1466, is responsible for most (101 of 148, 68%) serogroup Y cases wi​th available sequence type data that were reported across the United States in 2023. Cases caused by this strain are disproportionately occurring in people ages 30–60 years (65%), Black or African American people (63%), and people with HIV (15%). In addition, most cases of invasive meningococcal disease caused by ST-1466 in 2023 had a clinical presentation other than meningitis: 64% presented with bacteremia, and at least 4% presented with septic arthritis. Of 94 patients with known outcomes, 17 (18%) died; this case-fatality rate is higher than the historical case-fatality rate of 11% reported for serogroup Y cases in 2017–2021. Healthcare providers should 1) have a heightened suspicion for meningococcal disease, particularly among populations disproportionately affected by the current increase, 2) be aware that patients may present without symptoms typical of meningitis, and 3) ensure that all people recommended for meningococcal vaccination, including people with HIV, are up to date for meningococcal vaccines.

    • Increase in Global and Domestic Measles Cases and Outbreaks: Ensure Children in the United States and Those Traveling Internationally 6 Months and Older are Current on MMR Vaccination 

      CDC/Health Advisory – March 18, 2024 – The Centers for Disease Control and Prevention (CDC)  is issuing this Health Alert Network (HAN) Health Advisory to inform clinicians and public health officials of an increase in global and U.S. measles cases and to provide guidance on measles prevention for all international travelers aged 6 months and older and all children aged 12 months and older who do not plan to travel internationally. Measles (rubeola) is highly contagious; one person infected with measles can infect 9 out of 10 unvaccinated individuals with whom they come in close contact. From January 1 to March 14, 2024, CDC has been notified of 58 confirmed U.S. cases of measles across 17 jurisdictions, including seven outbreaks in seven jurisdictions compared to 58 total cases and four outbreaks reported the entire year in ​2023. Among the 58 cases reported in 2024, 54 (93%) were linked to international travel. Healthcare providers should ensure children are current on routine immunizations, including MMR. Given currently high population immunity against measles in most U.S. communities, the risk of widescale spread is low. However, pockets of low coverage leave some communities at higher risk for outbreaks.​

        • Extension of Long-Acting Benzathine Penicillin G (Bicillin®​ L-A) Shortage

          CDPH/Health Advisory – March 18, 2024 – The Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA) previously announced a long-acting benzathine penicillin G (Bicillin®​ L-A) shortage and estimated recovery of supplies in the second quarter of 2024. Unfortunately, the expected recovery time has now been extended to the fourth quarter of 2024. As such, CDPH is recommending the continued prioritization of Bicillin® L-A and Extencilline® for pregnant people with syphilis and certain infants exposed to syphilis in pregnancy. Furthermore, CDPH reminds providers that oral doxycycline is an appropriate alternative treatment for non-pregnant adults with primary, secondary, early/late latent syphilis and syphilis of unknown duration. 

      • Immediate Respiratory Isolation Recommended for Persons with Suspected Measles

        CDPH/Health Advisory – March 14, 2024 – The Centers for Disease Control and Prevention (CDC) is reporting an increase of measles in international travelers, resulting in at least 45 cases reported nationwide so far in 2024. Four cases have been reported in California, all of whom traveled overseas. CDPH recommends that healthcare providers suspect measles in patients with fevers, rash and any of the "3 Cs" (cough, coryza, or conjunctivitis) who have traveled internationally or interacted with international visitors in the last 3 weeks. In healthcare settings, to prevent spread if measles is suspected, isolate the patient immediately, in an airborne infection room (AIIR) if possible, and promptly telephone the local public health department to report suspected cases. Ensure that patients are up to date on measles vaccinations before traveling abroad.

    • Substantial Increase in Tuberculosis in California: Recommendations for California Healthcare Providers

      CDPH/Health Advisory – February 26, 2024 – The California Department of Public Health (CDPH) is releasing this Health Advisory to inform healthcare providers about the recent increase in tuberculosis (TB) cases in California. CDPH encourages providers to consider tuberculosis in their differential diagnoses, to test persons with risk factors for tuberculosis, and to offer treatment to those with latent tuberculosis infection (LTBI) to prevent progression to active TB disease. Healthcare providers in California are required to report TB cases to their local public health department.​


  • CDPH/Health Advisory – February 2, 2024 – The California Department of Public Health (CDPH) reminds health care providers to consider measles ​in persons presenting with a febrile rash illness and other symptoms consistent with measles. Multiple measles cases have been confirmed in the United States in recent weeks, and have been linked to overseas travel, reflecting a global rise in measles cases. Airborne precautions should be immediately instituted to prevent nosocomial measles exposures, and patients should be up to date with measles vaccinations, especially if planning to travel abroad. Healthcare providers in California should report suspect measles cases to their local health department (LHD) by telephone, even before laboratory confirmation.​

  • Substantial Rise in Coccidioidomycosis in California: Recommendations for California Healthcare Providers 

    CDPH/Health Advisory - January 18, 2024 - The California Department of Health (CDPH) reminds healthcare providers to consider coccidioidomycosis in the differential diagnosis of community acquired pneumonia (CAP) or other respiratory illnesses in endemic or emerging areas. A total of 9280 cases of coccidioidomycosis with illness onset dates in 2023 have been reported in California to date, which is higher than any other year on record, and is an increase that is likely to continue this winter due to heavy rainfall last winter after years of drought. Providers should maintain strong suspicion of pulmonar​y coccidioidomycosis in a patient with CAP who does not respond to an initial course of antibiotics, who has significant exposure to dust or dirt, or whose symptoms last more than 1-2 weeks. Negative serology in a patient with compatible symptoms may not rule out the diagnosis, and culture and polymerase chain reaction (PCR) test, if available, should be considered in patients with severe disease. Healthcare providers in California should report cases to their local public health department. ​

  • Update on COVID-19 Medications and Transition to Commercial Marketplace​

    CDPH/Health Advisory - December 18, 2023 - Once a high-risk individual is diagnosed with COVID-19, early treatment with antivirals is the best existing strategy to decrease the risk of serious illness and prevent hospitalization. All available COVID-19 oral antivirals have now transitioned to the commercial market after almost two years of being available free of charge through the US government, representing a significant change for patients and providers alike. This health alert will outline the broad changes in the transition, give several resources for more information, as well as how to obtain free or lower-cost medication for patients who qualify, and highlights the importance of continuing to offer and prescribe therapeutic agents for COVID-19 when appropriate. ​​​​

  • ​​​Urgent Need to Increase Immunization Coverage for Influenza, COVID-19, and RSV Immunizations and Use of Authorized/Approved Therapeutics in the Setting of Increased Respiratory Disease Activity During the 2023 – 2024 Winter Season

    ​CDC/Health Advisory - December 14, 2023-The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to alert healthcare providers to low vaccination rates against influenza, COVID-19, and RSV (respiratory syncytial virus). Low vaccination rates, coupled with ongoing increases in national and international respiratory disease activity caused by multiple pathogens, including influenza viruses, SARS-CoV-2 (the virus that causes COVID-19), and RSV, could lead to more severe disease and increased healthcare capacity strain in the coming weeks. Healthcare providers should administer influenza, COVID-19, and RSV immunizations now to patients, if recommended. Healthcare providers should recommend antiviral medications for influenza and COVID-19 for all eligible patients, especially patients at high-risk of progression to severe disease such as older adults and people with certain underlying medical conditions. ​​

  • ​​Clade I Mpox Virus with Geographic Spread in the Democratic Republic of the Congo: Recommendations for California Health Care Providers

    CDPH/Health Advisory - December 11, 2023-The California Department of Public Health (CDPH) is issuing this California Health Alert Network (CAHAN) Health Advisory to notify clinicians and local health departments (LHD) about the occurrence, geographic spread, and sexually associated human-to-human transmission of Clade I Monkeypox virus (MPXV) in the Democratic Republic of the Congo (DRC). This is a more severe form of mpox with higher fatality rates than Clade IIb, which is currently circulating in the US. MPXV has two distinct genetic clades (subtypes), and cases of Clade I MPXV have not been reported in the United States at this time. However, clinicians should be aware of the possibility of Clade I MPXV in travelers or close contacts (including sexual contacts) of travelers who have been in DRC. ​

    Clinicians should notify their LHD if they have a patient with mpox-like symptoms, which may include rash, sores, fever, and/or lymphadenopathy,  in a traveler or close contacts (including sexual contacts) of travelers returning from the DRC. The CDPH VRDL offers MPXV testing that will discriminate between Clade I and Clade II. Healthcare providers are advised to contact their Local Health Department and CDPH VRDL to coordinate MPXV testing. Please refer to the VRDL Test page for mpox virus testing guidance at this link: Contact information for CDPH VRDL: (510) 307-8585 or VRDL.Submittal@cdph.ca.gov.​​

  • Severe and Fatal Confirmed Rocky Mountain Spotted Fever among People with Recent Travel to Tecate, Mexico​​

    ​CDC/Health Advisory– December 8, 2023-The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to notify healthcare providers and the public about an outbreak of Rocky Mountain spotted fever (RMSF) among people in the United States with recent travel to or residence in the city of Tecate, state of Baja California, Mexico. RMSF is a severe, rapidly progressive, and often deadly disease transmitted by the bite of infected ticks, although many patients do not recall being bitten by a tick. Doxycycline is the treatment of choice for patients of all ages. Healthcare providers should consider RMSF in their differential diagnosis of patients who have reported recent travel to Tecate, Mexico, or other areas of northern Mexico and subsequently develop signs or symptoms of an unexplained severe febrile illness. Consider initiating doxycycline based on presumptive clinical and epidemiologic findings, and do not delay treatment pending the result of a confirmatory laboratory test. Early treatment with doxycycline saves lives. Healthcare providers in California should report cases to their local public health department. ​

  • Mpox Caused by Human-to-Human Transmission of Monkeypox Virus with Geographic Spread in the Democratic Republic of the Congo​​​

    CDC/Health Advisory– December 7, 2023-The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to notify clinicians and health departments about the occurrence, geographic spread, and sexually associated human-to-human transmission of Clade I Monkeypox virus (MPXV) in the Democratic Republic of the Congo (DRC). MPXV has two distinct genetic clades (subtypes), and cases of Clade I MPXV have not been reported in the United States at this time (a clade is a broad grouping of viruses that has evolved over decades and is a genetic and clinically distinct group). However, clinicians should be aware of the possibility of Clade I MPXV in travelers who have been in DRC. Clinicians should notify their state health department if they have a patient with mpox-like symptoms, which may include a diffuse rash and lymphadenopathy, and recent travel to DRC. Clinicians should also submit lesion specimens for clade-specific testing for these patients.​

  • High Blood Lead Levels in Childr​en Consuming Recalled Cinnamon Applesauce Pouches​

    CDC/Health Advisory– November 13, 2023-Multiple states have reported potential cases to the U.S. Food and Drug Administration (FDA) of high blood lead levels (BLLs) in children consuming recalled cinnamon-containing applesauce products​ that have high levels of lead. The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to advise clinicians and health departments to consider the possibility of illness due to lead exposure and report cases to their local health authorities.

  • Increase in Mpox Cases in California: Updates on Identification, Laboratory Testing, Management and Treatment, and Vaccination for Mpox​

    CDPH/Health Advisory– October 30, 2023-The California Department of Public Health (CDPH) is releasing this Health Advisory to inform healthcare provid​ers about the recent increases in mpox cases. CDPH encourages providers to consider mpox in their differential diagnoses, to test persons with s​​​uspected mpox, to treat mpox, and to offer vaccines to populations at increased risk to prevent severe mpox disease and reduce the number of new infections. ​

  • Dengue in California​

    CDPH/Health Advisory– October 30, 2023 - The California Department of Public Health (CDPH) is releasing this Health Advisory to alert healthcare providers that the first locally acquired case of dengue in California was detected in a Pasadena resident; no other locally acquired dengue cases have been identified in California. To date, local vector control agency surveys have not identified dengue-infected mosquitoes in Los Angeles County. Healthcare professionals should report any dengue virus infection to their local public health department within one working day from identification. 

  • Early Respiratory Syncytial Virus (RSV) Activity and Use of RSV Prevention Products

    CDPH/Health Advisory– October 2​​7, 2023 - The California Department of Public Health (CDPH) is releasing this Health Advisory to bring awareness to the October 23, 2023 Centers for Disease Control and Prevention (CDC) issued Health Alert Network (HAN) Health Advisory which provides options and prioritization guidance for clinicians to protect infants from respiratory syncytial virus (RSV) in the context of a limited supply of nirsevimab, a long-acting monoclonal antibody immunization product recommended for preventing RSV-associated lower respiratory tract disease in infants. Respiratory syncytial virus (RSV) is the most common cause of bronchiolitis and pneumonia in infants and a cause of severe disease in older adults.​

  • Limited Availability of Nirsevimab in the United States—Interim CDC Recommendations to Protect Infants from Respiratory Syncytial Virus (RSV) during the 2023–2024 Respiratory Virus Season​

    CDC/Health Advisory– October 23​​, 2023 -The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to provide options for clinicians to protect infants from respiratory syncytial virus (RSV) in the context of a limited supply of nirsevimab,​​ a long-acting monoclonal antibody immunization product recommended for preventing RSV-associated lower respiratory tract disease in infants.

  • Preparation for Respiratory Virus Season (COVID-19, Influenza and RSV)​

    CDPH/Health Advisory– October 10​, 2023 - The California Department of Health (CDPH) is releasing this Health Advisory to provide guidance to healthcare providers who are planning for and responding to an anticipated surge in illnesses due to respiratory viruses, pa​​rticularly in response to recent rises in SARS-CoV-2 transmission and anticipated seasonal rises in other respiratory pathogens.​​ While local influenza and RSV transmission remain low at this time, and SARS-CoV-2 hospitalizations may be plateauing, seasonal activity of those viruses is expected to increase in the coming weeks to months.

  • Increased Respiratory Syncytial Virus (RSV)​ Activity in Parts of the Southeastern United States: New Prevention Tools Available to Protect Patients​

    CDC/Health Advisory– September 5, 2023 - The Centers for Disease Control and Prevention (CDC) ​​is issuing this Health Alert Network (HAN) Health Advisory to notify clinicians and caregivers about increases in respiratory syncytial virus (RSV) activity across some parts of the Southeastern United States in recent weeks, suggesting a continued shift toward seasonal RSV trends observed prior to the COVID-19 pandemic. Historically, such regional increases have predicted the beginning of RSV season nationally, with increased RSV activity spreading north and west over the following 2–3 months. RSV can cause severe disease in infants, young children, and older adults. ​

  • Severe Vibrio vulnificus Infections in the United States Associated with Warming Coastal Waters

    CDC/Health Advisory– September 1, 2023 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to notify healthcare providers, laboratories and public health departments about recent reports of fatal Vibrio vulnificus (V​. vulnificus) ​infections including wound and foodborne infections. Healthcare professionals are urged to consider V. vulnificus ​as a possible cause of infected wounds that were exposed to coastal waters, particularly near the Gulf of Mexico or East Coast, and during periods with warmer coastal sea surface temperatures​. Healthcare providers in California should report cases to their local p​ublic health department. 

  • ​Important Updates on Locally Acquired Malaria Cases Identified in Florida, Texas and Maryland​​

    CDC/Health Update– August 28, 2023 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Update to share new information with clinicians, public health authorities, and the public about locally acquired malaria cases identified in the United States. On August 18, 2023, a single case of locally acquired malaria was reported in Maryland in the National Capital Region. This case was caused by the Plasmodium falciparum (P. falciparum) species and is unrelated to the cases involving local transmission of Plasmodium vivax (P. vivax) malaria in Florida and Texas described in the HAN Health Advisory 494 issued on June 26, 2023. As an update to that report, to date, Florida has identified seven cases and Texas has identified one case of locally acquired P. vivax malaria, but there have been no reports of local transmission of malaria in Florida or Texas since mid-July 2023.​​

  • CDPH/Health Advisory – August 28, 2023 - The ​Sonoma Department of Health Services (SDHS) and California Department of Public Health (CDPH) are investigating an Aeromonas outbreak linked to Tough Mudder adventure race events at the Sonoma Raceway on August 19 and 20, 2023. Numerous race participants have experienced skin and soft tissue infections (SSTIs, ​most frequently described as a pustular rash), along with other symptoms such as fever and headache. Healthcare providers should ask patients presenting with SSTIs about whether they participated in a Tough Mudder race at the Sonoma Raceway and should report cases to their local public health department. 

  • CDPH/Health Advisory – August 15, 2023 - In response to the U.S Food and Safety Administration​ recall announcement, the Centers for Disease Control and Prevention (CDC) and the California Department of Public Health (CDPH) are encouraging healthcare providers to remain vigilant for possible Listeria infections. On August 9, Real Kosher Ice Cream recalled all flavors of their “Soft Serve On The Go” ice cream cups. Recalled ice cream cups were distributed nationwide to multiple long-term care facilities. There has been one sick person in this outbreak that was served this ice cream cup while residing in a long-term care facility. California long term care facilities and healthcare providers should contact their local health department immediately if they identify a case in a resident of a long-term care facility or if there are multiple suspected cases.

  • CDPH/Health Advisory – June 25, 2023 - Since 2010, more than 1,000 cases of silicosis in workers who fabricate countertops have been reported worldwide. Workers in this industry can inhale crystalline silica dust as they cut and finish countertops, which places them at risk for silicosis, a severe, incurable lung disease. In California, more than 70 cases of silicosis and at least 10 deaths have been identified among countertop fabrication workers. Workers with silicosis are characterized as young (median age of 45), immigrant men; many have experienced delayed diagnoses and accelerated disease course. California health care providers should ask patients about their occupation and suspect silicosis in countertop workers. To report cases to CDPH, call 1-800-970-6680 or email silicosis@cdph.ca.gov.

  • CDC​/Health Advisory – June 30​​​​, 2023 –  The Centers for Disease Control and Prevention (CDC) is reminding healthcare professionals seeing patients affected by wildfire smoke to be alert to the possible adverse effects of smoke exposure, particularly among individuals at higher risk of severe outcomes. The acute signs and symptoms of smoke exposure can include head​ache, eye and mucous membrane irritation, dyspnea (trouble breathing), cough, wheezing, chest pain, palpitations and fatigue. Wildfire smoke exposure may exacerbate respiratory, metabolic, and cardiovascular chronic conditions like asthma, chronic obstructive pulmonary disease (COPD) and congestive heart failure​.

  • Locally Acquired Malaria Cases Idenified in the United States

    CDC​/Health Advisory – June 26, 2023 –  The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to share information and notify clinicians, public health authorities, and the public about: ​​1. Identification of locally acquired malaria cases (P. vivax) in two U.S. states (Florida [4] and Texas [1]) within the last 2 months. 2. Concern for a potential rise in imported malaria cases associated with increased international travel in summer 2023, and 3. Need to plan for rapid access to IV artesunate, which is the first-line treatment for severe malaria in the United States.​ 

  • Guidance on Measles During Summer Travel Season

    CDC​/Health Advisory – June 22, 2023 –  As the summer travel season begins, the Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to remind clinicians and public health officials to provide guidance for measles prevention to international travelers and to be on alert for cases of measles. The United States has seen an increase in measles cases during the first 5 months of 2023, with 16 reported cases compared with 3 in 2022 during the same period. Most of these cases were among children who had not received measles-mumps-rubella (MMR) vaccine. To prevent measles infection and spread from importation, all U.S. residents should be up to date on their MMR vaccinations, especially prior to international travel regardless of the destination. ​

  • Request to Submit Specimens from Patients Receiving Intensive Care for Influenza A to Public Health Laboratories

    CDPH/Health Update – June 21, 2023 –  In response to the global outbreak in birds of highly pathogenic avian influenza (HPAI) A(H5N1), the Centers for Disease Control and Prevention (CDC) and the California Department of Public Health (CDPH) are encouraging providers to remain vigilant and to test for influenza among persons with severe respiratory illnesses or who are exposed to poultry and swine​​​. California healthcare providers are requested to submit influenza positive A samples in several specific clinical scenarios described in the Health Update to local health department laboratories for influenzas A subtyping.​ ​

  • Xylazine in Illicit Fentanyl in the United States

    CDPH/Health​​​​​ Advisory - June 15, 2023 - ​​On April 12, the White House officially designated fentanyl adulterated or associated with xylazine as an emerging threat to the U.S. Xylazine is a veterinary sedative with no approval for human use and is increasingly present in overdose deaths in the United States, compounding the overdose crisis. California healthcare providers and community-based organizations serving people who use drugs should be vigilant for the presence of xylazine.​​

  • Important Updates on the Outbreak of Fungal Menigitis in U.S. Patients Who Underwent Surgical Procedures under Epidural Anesthesia in Matamoros, Mexico​​​​

    CDC/Health​​​​​ Update ​- June 2, 2023 - ​​The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Update to supplement the CDC HAN Health Advisory issued on May 17, 2023​. This Health Update provids updates on the status of the ongoing fungal meningitis outbreak and highlights interim recommendations for diagnosis and treatment. California healthcare providers should immediately report suspected fungal meningitis cases, including those possibly related to this outbreak, to their local health department and the CDPH Healthcare-Associated Infections (HAI) Program at HAIProgram@cdph.ca.gov.​

  • Bicillin® L-A (Benzathine Penicillin G) Shortag​​e​​​

    CDPH/Health​​​​​ Advisory - June 1, 2023 - ​​The Centers for Disease Control and Prevention (CDC) and the U.S. Food and Drug Administration (FDA) have announced and listed long-acting penicillin G benzathine injectable suspension products (Bicillin® L-A) on their respective drug shortage webpages, estimating a recovery timeframe in Q4 2023. This is of considerable concern to California as the state continues to see significant increases in syphilis, including syphilis in pregnant persons and congenital syphilis in infants. CDPH recommends prioritizing Bicillin® L-A for pregnant people with syphilis infection or exposure, infants with congenital syphilis infection or exposure, and patients with contraindications to doxycycline. Health care providers can monitor the Bicillin® L-A drug shortages on the FDA Drug Shortages webpage.​​

  • California ​​Healthcare Providers Preventing a Resurgence of Mpox Cases in California​
    CDPH/Health​​​​​ Advisory - June 1, 2023 - ​​While the rate of mpox has declined precipitously since its peak in August 202​2, mpox transmission has continued in California, and other states have recently reported a resurgence of mpox cases​. On May 30, 2023 CDPH sent a letter to Californian health care providers as a call to action to remain vigilant in mpox prevention, recognition, and testing, especially during the upcoming 2023 spring and summer season as people gather for festivals and events, including LGBTQ Pride Month in June. Information on how to diagnose, test for, and vaccinate mpox is included. The letter is available online​. Please contact CDPH STD Control Branch at STDCB@cdph.ca.gov​ with any questions.

  • Outbreak of Suspected Fungal Meningitis in U.S. Patients who Underwent Surgical Procedures under Epidural Anesthesia in Matamoros, Mexico ​

    CDC/Health​​​​​ Advisory - May 17, 2023 - ​​The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory. California healthcare providers should immediately report suspected fungal meningitis cases, including those possibly related to this outbreak, to their local healthdepartment and the CDPH Healthcare-Associated Infections (HAI) Program at HAIProgram@cdph.ca.gov.​​​

  • Potential Risk for New Mpox Cases

    ​CDC/Health​​​​​ Update - May 15, 2023 - The Centers for Disease Control and​​ Prevention (CDC) is issuing this Health Alert Network (H​AN) Health Update to inform clinicians and public health agencies about the potential for new clusters or outbreaks of mpox cases and to provide resources on clinical evaluation, treatment, vaccination, and testing. 

  • ​Marburg Virus Disease Outbreaks in Equatorial Guinea and Tanzania

    CDC/Health​​​​​ Advisory - April 6, 2023 - ​​The Centers for Disease Control and​​ Prevention (CDC) is issuing this Health Alert Network (H​AN) Health Advisory​ to notify clinicians and public health departments in the United States about two confirmed outbreaks of Marburg virus disease (MVD)—one in Equatorial Guinea and one in Tanzania. This Health Advisory provides information about these outbreaks to increase awareness of the risk of imported cases in the United States.

  • Updates on Identification, Laboratory Testing, Management and Treatment, and Vaccination for Mpox Virus Infection in California
    CDPH/Hea​lth​​​​​ Advisory - April 4, 2023 - ​​The California Deparment of Public Health (CDPH) are alerting healthcare providers of the need to identify and test, including testing for HIV and STDs in people with mpox. This advisory includes information on management, treatment, vaccination and updates to information and recommendations about severe mpox, including recent CDC interim clinical treatment considerations for severe mpox.​

  • Elevated Norovirus Activity in California 
    CDPH/Health​​​​​ Advisory - March 28, 2023 - ​​The California Deparment of Public Health (CDPH) are alerting healthcare providers regarding Norovirus activity. Since February 1, 2023, at least 25 outbreaks of norovirus in California have been confirmed by laboratory testing, likely reflecting hundreds of illnesses in the state. CDPH reminds healthcare providers to report all outbreaks of acute gastroenteritis, including suspected outbreaks of norovirus, to their local health departments.  ​

  • Measles Exposure at a Large Gathering in Kentucky, F​ebruary 2023 and Global Measles Outbreaks  
    CDC/Health​​​​​ Advisory - March 3, 2023 - ​​The Centers for Disease Control and​​ Prevention (CDC) is issuing this Health Alert Network (H​AN) Health Advisory​ to notify clinicians and public health officials about a confirmed measles case at a large gathering. This Health Advisory also highlights other recent large global measles outbreaks and associated U.S. importations, and the importance of early recognition, diagnosis, and appropriate treatment. CDC recommends that clinicians be on alert for cases of measles that meet the case definition.

  • Increased Chikungunya Virus Activity in Paraguay and Associated Risk to Travelers​

    CDC/Health​​​​​ Advisory - March 2, 2023 - ​​The Centers for Disease Control and​​ Prevention (CDC) is issuing this Health Alert Network (H​AN) Health Advisory to notify clinicians and public health authorities of an increase in the number of cases of chikungunya reported in Paraguay. The Health Advisory provides information on the current status of the chikungunya outbreak in Paraguay and advises on evaluating and testing travelers returning from Paraguay with signs and symptoms consistent with chikungunya virus infection.

  • Increase in Extensively Drug-Resistant Shigellosis in the United States ​
    CDC/Health​​​​​ Advisory - Februa​​​ry 24, 2023 - ​​The Centers for Disease Control and​​ Prevention (CDC) is issuing this Health Alert Network (H​AN) Health Advisory a​bout the increase in extensively drug-resistant (XDR) Shigella​ infections (shige​llosi​s) reported through national surveillance systems. CDC asks healthcare professionals to be vigilant about suspecting and reporting cases of XDR Shigella infection to their local or state health department and educating patients and communities at increased risk about prevention and transmission.

  • Emergence of Candida auris in Healthcare Facilities in Northern California​

    CDPH/Health Advi​​sory - February 8, 2023 - The California Department of Public Health (CDPH) and local public health partners are alerting healthcare providers of the emergence of epidemiologically-linked Candida auris (C. auris) cases associated with acute care hospital (ACH), skilled nursing facility (SNF), and outpatient settings in Sacramento and Stanislaus counties since September 2022.

  • Outbreak of Extensiv​ely Drug-resistant Pseudomonas aeruginosa Associated with Artificial Tears   

    CDC/Health Advisory - February 1, 2023 - ​​The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory a​bout infections with an extensively drug-resistant strain of Verona Integron-mediated Metallo-β-lactamase (VIM) and Guiana-Extended Spectrum-β-Lactamase (GES)-producing carbapenem-resistant Pseudomonas aeruginosa (VIM-GES-CRPA) in 12 states. 

Page Last Updated :