office of communications

California Health Alert Network (CAHAN)

The California Health Alert Network (CAHAN) is the State of California’s web-based information and communications system for distribution of health alerts, dissemination of treatment and prevention guidelines, coordination of disease investigation efforts, preparedness planning, and other initiatives that strengthen state and local preparedness.

Other Health Advisories:

All Facilities Letters - An All Facilities Letter (AFL) is a letter 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 - CAHAN health advisories that were issued by the HAI Program.
Centers for Disease Control (CDC) - Health Alert Network (HAN)

2023
2022

Measles Exposure at a Large Gathering in Kentucky, February 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 (HAN) 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 (HAN) 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 - February 24, 2023 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory about the increase in extensively drug-resistant (XDR) Shigella infections (shigellosis) 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 Advisory - 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 Extensively 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 about 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.

Increase in Pediatric Invasive Group A Streptococcal Infections

CDC/Health Advisory - December 22, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to notify clinicians and public health authorities of a recent increase in pediatric invasive group A streptococcal (iGAS) infections, the increased seasonal risk of iGAS disease for all age groups, and the importance of early recognition, diagnosis, and appropriate treatment of these diseases in children and adults.
Important Updates on COVID-19 Therapeutics for Treatment and Prevention
CDC/Health Update - December 20, 2022 - This Health Alert Network (HAN) Health Update provides health care professionals, public health officials, and the public with guidance on improving use of therapeutics for treatment of COVID-19 and strategies to prevent serious outcomes of COVID-19.
Interim Guidance for Clinicians to Prioritize Antiviral Treatment of Influenza in the Setting of Reduced Availability of Oseltamivir

CDC/Health Advisory - December 14, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to provide clinicians and public health officials with guidance for prioritizing oseltamivir for treatment and information on other influenza antivirals that are recommended for treating influenza in areas where oseltamivir is temporarily unavailable.
Evaluating and Managing Travelers Returning from Ebola Outbreak Areas with Infectious Disease Symptoms

CDPH/Health Advisory - December 13, 2022 - This alert provides updated information for California healthcare providers in the evaluation and management of patients suspected of having Ebola virus disease (EVD).
Updated Reminder to Lower Barriers to Prescribing COVID-19 Therapeutics to Mitigate Impact of COVID-19
CDPH/Health Advisory - December 2, 2022 - Once an individual is diagnosed with COVID-19, early treatment with COVID-19-specific agents is the only existing strategy to markedly decrease risk of serious illness.
Update on Managing Monkeypox in Patients Receiving Therapeutics
CDC/Health Alert - November 17, 2022 - Monkeypox cases have declined since mid-August 2022 in the United States; however, new cases—including clinically severe cases—continue to occur.
Early Respiratory Syncytial Virus and Seasonal Influenza Activity

CDPH/Health Alert - November 12, 2022 - As RSV and other respiratory virus activity continues to evolve and new evidence emerges, California Department of Public Health (CDPH) will collaborate with local health departments to assess and provide additional updates as they become available.
Call for Cases: Multistate Cluster of Verona Integron-mediated Metallo-ß-lactamase (VIM)-producing Carbapenem-resistant Pseudomonas aeruginosa
CDPH/Health Alert - November 8, 2022 - On October 27, 2022, the Centers for Disease Control and Prevention (CDC) issued a call for cases through the Epidemic Information Exchange (Epi-X), for a multistate cluster of VIM-producing carbapenem-resistant Pseudomonas aeruginosa (VIM-CRPA) under investigation with state and local public health departments.
Update on Ebola Virus Disease (Sudan ebolavirus) Outbreak in Central Uganda

CDC/Health Alert - November 7, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Update as a follow-up to a HAN Health Advisory (Outbreak of Ebola virus disease (Sudan ebolavirus) in Central Uganda) issued on October 6, 2022.
Increased Respiratory Virus Activity, Especially Among Children, Early in the 2022-2023 Fall and Winter

CDC/Health Alert - November 4, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory about early, elevated respiratory disease incidence caused by multiple viruses occurring especially among children and placing strain on healthcare systems.
Outbreaks of Nontuberculous Mycobacteria Infections Highlight Importance of Maintaining and Monitoring Dental Waterlines

CDC/Health Alert - October 31, 2022 -The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to emphasize the importance of following existing recommendations for maintaining and monitoring dental waterlines.
Outbreak of Ebola Virus Disease Due to Sudan Virus in Central Uganda
CDPH/Health Alert - October 7, 2022 - The California Department of Public Health (CDPH), in collaboration with the U.S. Centers for Disease Control and Prevention (CDC), has been closely monitoring an outbreak of Ebola virus disease (EVD) due to Sudan virus (species Sudan ebolavirus) in Central Uganda.
Public Health Officer Order Updates Effective October 4th, 2022, regarding mandatory reporting of COVID-19 results by HCPs
CDPH/Healthcare Provider Advisory - October 6, 2022 - This Health Advisory outlines that health care providers (HCP) are required to report cases of Coronavirus disease 2019 (COVID-19) pursuant to provisions of title 17, California Code of Regulations sections 2500.
Outbreak of Ebola virus disease (Sudan ebolavirus) in Central Uganda
CDC/Health Alert - October 6, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory about a recently confirmed outbreak of Ebola virus disease (EVD) in Uganda caused by Sudan virus (species Sudan ebolavirus) to summarize CDC’s recommendations for U.S. public health departments and clinicians, case identification and testing, and clinical laboratory biosafety considerations.
Guidance for Safe Specimen Collection From Monkeypox (MPX) Lesions: Reminder to NOT De-roof Lesions and NOT Use Sharps

CDPH/Healthcare Provider Advisory - October 5, 2022 - This Advisory reminds California healthcare providers of Centers for Disease Control and Prevention (CDC) recommendations to reduce risk of MPX virus transmission to healthcare personnel (HCP) during collection of specimens from lesions for laboratory diagnosis of MPX.
Early Respiratory Syncytial Virus Activity and Use of Palivizumab
CDPH/Health Advisory - October 3, 2022 - Respiratory syncytial virus (RSV) is the most common cause of bronchiolitis and pneumonia in infants and a cause of severe disease in adults older than age 65 years.
Hurricanes Fiona and Ian—Clinical Guidance for Carbon Monoxide (CO) Poisoning
CDC/Health Alert - October 3, 2022 - The Centers for Disease Control and Prevention (CDC) is reminding healthcare professionals seeing patients from areas affected by Hurricanes Fiona or Ian to maintain a high index of suspicion for carbon monoxide (CO) poisoning.
Severe Manifestations of Monkeypox among People who are Immunocompromised Due to HIV or Other Conditions (PDF)
CDC/Health Alert - September 29, 2022 - Since May 2022, more than 25,000 monkeypox cases have been identified in the United States.
Healthcare Provider Health Advisory: Public Health Officer Order Updates Effective September 17th, 2022, regarding testing requirements for workers in both congregate and high-risk settings
CDPH/Health Advisory - September 28, 2022 - The California Department of Public Health (CDPH) has updated several state public health officer orders to align with the most current Centers for Disease Control and Prevention (CDC) recommendations that screening testing is no longer recommended in general community settings.
State Public Health Leaders Warn School Leaders of New Brightly Colored "Rainbow Fentanyl" Trend
CDPH/Health Alert - September 22, 2022 - Fentanyl (an extremely potent and dangerous synthetic opioid) continues to be a major contributor to drug overdoses in California, including among youth.
Vigilance for Acute Flaccid Myelitis (AFM) Warranted - Recent Detections of Enterovirus D68 and Poliovirus in the United States

CDPH Health Advisory - September 15, 2022 - The California Department of Public Health (CDPH) requests healthcare providers and local health departments to be vigilant for acute flaccid myelitis (AFM), which typically presents with sudden limb weakness in children that can lead to permanent paralysis.
Healthcare Provider Health Advisory: Updated Guidance on Laboratory Testing of Pediatric Patients for MPX Virus Infection in California

CDPH Health Advisory - September 9, 2022 - This alert provides updated information for California healthcare providers with regard to testing of pediatric patients for MPX.
Severe Respiratory Illnesses Associated with Rhinoviruses and/or Enteroviruses Including EV-D68 –Multistate, 2022

CDC/Health Alert - September 9, 2022 - Healthcare providers and hospitals in several regions of the United States notified the Centers for Disease Control and Prevention (CDC) during August 2022 about increases in pediatric hospitalizations in patients with severe respiratory illness who also tested positive for rhinovirus (RV) and/or enterovirus (EV).
Title 17 Revisions, Section 2500 of the California Code of Regulations

CDPH/Health Alert - September 6, 2022 - The California Department of Public Health, in consultation with the California Conference of Local Health Officers, recently updated Title 17 section 2500 of the California Code of Regulations.
Candida auris in Nevada State Healthcare Facilities September 2022

CDPH/Health Advisory - September 6, 2022 - CDPH and local public health partners are alerting healthcare providers of the continued identification of Candida auris (C. auris) cases in Southern California, and the emergence of C. auris cases linked to hospitals and skilled nursing facilities (SNF) in Southern Nevada since August 2021.
Healthcare Provider Health Advisory: Updates on Laboratory Testing and Treatment for Monkeypox (MPX) Virus Infection in California
CDPH/Health Advisory - August 31, 2022 - This alert provides updated information for California healthcare providers for testing of suspected MPX cases and treatment of suspected, probable, and confirmed MPX cases at risk for severe outcomes.
Variant Influenza Virus Infections: Recommendations for Identification, Treatment, and Prevention for Summer and Fall 2022 (PDF)
CDC/Health Alert - August 30, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to provide updates on recent variant1 influenza virus infections and summarize CDC’s recommendations for identification, treatment, and prevention of variant influenza virus infection for the summer and fall of 2022.
Extreme Temperatures Notification - Phase II Excessive Heat Event
CDPH/Health Advisory - August 31, 2022 - The California Department of Public Health was notified by the California State Warning Center that California has now entered Phase II of the State Contingency Plan for Excessive Heat Emergencies.
Update for Clinicians on Monkeypox in People with HIV, Children and Adolescents, and People who are Pregnant or Breastfeeding

CDC/Health Alert - July 29, 2022 - The Centers for Disease Control and Prevention (CDC) and state and local public health partners are reporting 5,189 cases of Monkeypox virus infections in the United States across 47 states, Washington, D.C., and Puerto Rico.
Update for Clinicians on Testing and Treatment for Monkeypox
CDC/Health Alert - July 28, 2022 - The Centers for Disease Control and Prevention (CDC) and state and local public health partners are reporting 4,907 cases of monkeypox in the United States across 46 states, Washington, D.C., and Puerto Rico.
Melioidosis Locally Endemic in Areas of the Mississippi Gulf Coast after Burkholderia pseudomallei Isolated in Soil and Water and Linked to Two Cases – Mississippi, 2020 and 2022 (PDF)

CDC/Health Alert - July 27, 2022 - The Centers for Disease Control and Prevention (CDC) identified the bacterium Burkholderia pseudomallei (B. pseudomallei) for the first time in the environment in the continental United States.
Recent Reports of Human Parechovirus (PeV) in the United States—2022 (PDF)

CDC/Health Alert - July 12, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Advisory to inform clinicians and public health departments that parechovirus (PeV) is currently circulating in the United States.
Healthcare Provider Health Advisory: Managing Monkeypox Virus Infection in California, Updated June 23, 2022
CDPH/Health Advisory - June 23, 2022 - The California Department of Public Health (CDPH) continues to work with local health departments (LHDs) and California healthcare providers on the ongoing monkeypox situation impacting the United States and other countries not usually endemic for monkeypox.
Updated Case-finding Guidance: Monkeypox Outbreak—United States, 2022

CDC/Health Alert - June 14, 2022 - This Health Alert Network (HAN) Health Update serves to alert clinicians to clinical presentations of monkeypox seen so far in the United States and to provide updated and expanded case definitions intended to encourage testing for monkeypox among persons presenting for care with relevant history, signs, and symptoms.
Health Update on Recurrence of COVID-19 Symptoms After Treatment with Paxlovid (nirmatrelvir/ritonavir)
CDPH/Health Advisory - June 7, 2022 - The California Department of Public Health is issuing this Health Alert to update public health departments, healthcare providers, and the public about the potential for “rebound” symptoms of COVID-19 after completion of a 5-day course of Paxlovid.
Recommendation for Meningococcal Vaccine (MenACWY) for Men who have Sex with Men (MSM)—Florida Meningococcal Outbreak (PDF)
CDPH/Health Advisory - June 6, 2022 - Since April 2022, in response to an ongoing outbreak of serogroup C invasive meningococcal disease (IMD) in Florida, CDC has encouraged gay, bisexual, and other men who have sex with men (MSM) to: Receive quadrivalent meningococcal conjugate vaccine (MenACWY) if they live in Florida and talk with their healthcare provider about getting MenACWY if traveling to Florida.
Healthcare Provider Monkeypox Health Advisory, May 27, 2022: Monkeypox Virus Infection in the United States and Other Non-endemic Countries
CDPH/Health Advisory - May 27, 2022 - The California Department of Public Health (CDPH) continues to work with local health departments (LHDs) and California healthcare providers on the ongoing domestic monkeypox situation.
Monkeypox Virus Infection in the United States and Other Non-endemic Countries- Enhancing Surveillance in California as of May 20, 2022

CDPH/Health Advisory - May 20, 2022 - The California Department of Public Health (CDPH) is issuing this advisory to supplement the information contained in the Health Alert issued by the U.S. Centers for Disease Control and Prevention(CDC) to provide additional guidance to California local health jurisdictions (LHJs) and health care providers.
Seasonal Influenza Activity is Increasing in California May 17, 2022

CDPH/Health Advisory - May 17, 2022 - CDPH is notifying health care providers that seasonal influenza activity is gradually increasing, with elevated activity in Central California.
CDPH Advises Parents and Caregivers Against Making or Feeding Homemade Infant Formula to Infants (PDF)

CDPH/Health Advisory - May 13, 2022 - The impacts of the ongoing pandemic and the recent 2022 Abbott recall of certain powdered infant formula has led to periodic location- and product-based shortages of major brands of infant formula.
Updated Recommendation for Adenovirus Testing and Reporting of Children with Acute Hepatitis of Unknow Etiology
CDC/Health Alert - May 11, 2022 - The Centers for Disease Control and Prevention (CDC) is issuing this Health Alert Network (HAN) Health Update to provide clinicians and public health authorities with updated information about an epidemiologic investigation of pediatric cases of hepatitis of unknown etiology in the United States.

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California Health Alert Network (CAHAN)

Other Health Advisories: