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This Web page is no longer being maintained or updated; it is provided for historical purposes only. For current information on seasonal influenza (flu), see the California Department of Public Health Influenza Web page.

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 H1N1 Flu Information

H1N1 Flu Vaccine Information 

Key H1N1 Flu Vaccine Questions and Answers

When will the H1N1 Flu vaccine be available? H1N1 Flu Vaccine is widely available and all Californians are encouraged to seek the H1N1 flu vaccine

Where can I get an H1N1 flu vaccination? Please monitor information from your health provider and local health department to find out when and where the H1N1 flu vaccine is available in your area. In addition, some retail pharmacies and outlets provide vaccine. CDPH suggests you call ahead to ensure the accuracy of the information. You will also find some helpful information on our Vaccination Locations page which is updated when new information is released.

Will the seasonal flu vaccine protect me from the H1N1 flu? The seasonal flu vaccine is not expected to protect against the 2009 H1N1 flu. However, getting your seasonal flu shot, following public health advice regarding school closures, and avoiding crowds are important before and after a 2009 H1N1 vaccine is available because they can prevent the spread of other viruses that cause respiratory infections.

Who should get the H1N1 Flu vaccination?

All Californians are encouraged to seek H1N1 flu vaccine. Priority groups for H1N1 vaccine include:

  • Pregnant women.
  • Persons who live with or provide care for infants aged <6 months (e.g., parents, siblings, and daycare providers).
  • Health-care and emergency medical services personnel.
  • Persons aged 6 months through 24 years.
  • Persons aged 25 through 64 years who have medical conditions that put them at higher risk for influenza-related complications. See information from CDC for Persons who are aged 65 and over.
  • NOTE: Children ages 6 months through nine years should receive two doses of H1N1 flu vaccine (separated by approximately 4 weeks apart).  Persons 10 years of age and older should receive only 1 dose. 
  • Questions about H1N1 Flu? Contact your health care provider or local health department for more information.

    Recent H1N1 Flu Vaccine News

  • Question and Answers: Shortened Expiration Period for Sanofi Pasteur 2009 H1N1 Vaccine in Pre-filled Syringes - February 4
  • Sanofi Pasteur Monovalent 2009 (H1N1) Influenza Vaccine in Pre-Filled Syringes - Shortened Shelf Life of Certain Lots - February 2
  • Questions and Answers: Non-Safety-Related Voluntary Recall of Sanofi Pasteur 2009 H1N1 Flu Vaccine in Pre-filled Syringes - February 3
  • Non-Safety-Related Voluntary Recall of Unused Doses from Certain Lots of Sanofi Pasteur H1N1 Vaccine in Pre-Filled Syringes - January 29
  • MMWR: Interim Results -  Influenza A (H1N1) 2009 Monovalent Vaccination Coverage - U.S., October-December 2009 - January 15
  • National Influenza Vaccination Week - January 10-16, 2010
  • CDPH Continues Innovative Outreach with Vaccine Locator Text Campaign - January 11
  • CDPH Launches Latest Campaign to Urge Californians to get the Flu Vaccine - January 7
  • Q & A: Voluntary Non-Safety-Related Recall of Specific Lots of Nasal Spray Vaccine for 2009 H1N1 Influenza - CDC, December 22
  • Q & A for Parents: Recall of Some Batches of Children's H1N1 Flu Vaccine - CDC, December 18
  • Non-Safety-Related Voluntary Recall of Certain Lots of Sanofi Pasteur H1N1 Pediatric (0.25ml, for 6-35 month olds) Vaccine in Pre-Filled Syringes Q & A - CDC, December 15
  • CDPH Press Release: California Fills Orders for More Than 5 Million Doses of H1N1 Vaccine - November 18
  • 2009 H1N1 Influenza Vaccine Supply Status - CDC, updated weekly
  • CMS Free Care Rule for 2009 H1N1 Influenza Vaccination (PDF) - CDC, October 27
  • H1N1 Vaccine and Thimerosal Exemption: Information for Interested Parties and Physicians - CDPH, October 15
  • H1N1 Vaccine co-pays and deductibles to be waived by California insurers October 7
  • H1N1 Flu Vaccine Information

  • Key Facts About 2009 H1N1 Flu Vaccine
  • For general information about vaccination, visit the CDPH Immunization Branch webpages

    Vaccine Information Statements

  • Live, Intranasal 2009 H1N1 Influenza Vaccine (PDF)Opens in a new browser window...Spanish (PDF) Opens in a new browser window ...Chinese (PDF) Opens in a new browser window
  • Inactivated 2009 H1N1 Influenza Vaccine (PDF)Opens in a new browser window ...Spanish (PDF) Opens in a new browser window ...Chinese (PDF) Opens in a new browser window 
  • H1N1 Flu Vaccine Information for Health Professionals 

  • H1N1 Flu Vaccine Information for Health Professionals
  • Vaccine Guidance and Recommendations
  • Vaccine Dosage, Administration, and Storage
  • Vaccine Adverse Event Reporting
  • Pneumococcal Vaccine Information

    Last modified on: 8/24/2011 8:50 PM