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Novel Influenza A (H1N1) Virus (Swine Flu)

 Information and Resources
Facts and Information for the Public
Influenza H1N1 (gripe porcina) Datos e Información
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Data and Statistics

Novel Influenza A H1N1 Virus imageNovel Influenza A (H1N1) virus (also referred to as "pandemic (H1N1) 2009 virus" or "swine flu") is a type of influenza (flu) virus that causes respiratory disease that can spread between people. Most people infected with this virus in the United States have had mild disease, but some have had more severe illness. On June 11, 2009, the World Health Organization (WHO) raised the worldwide pandemic alert level to Phase 6 in response to the ongoing global spread of the novel influenza A (H1N1) virus. Since the WHO declaration of a pandemic, the new H1N1 virus has continued to spread, with the number of countries reporting cases of novel H1N1 nearly doubling. The Southern Hemisphere’s regular influenza season has begun and countries there are reporting that the new H1N1 virus is spreading and causing illness along with regular seasonal influenza viruses. In the United States, significant novel H1N1 illness has continued into the summer, with localized and in some cases intense outbreaks occurring.

Symptoms: The symptoms of novel influenza A (H1N1) virus in people are similar to the symptoms of regular human flu and include fever, cough, sore throat, body aches, headache, chills and fatigue. Some people have reported diarrhea and vomiting associated with novel influenza A (H1N1) virus. If you are sick or think you have novel influenza A (H1N1) virus infection, please contact your healthcare provider.

Prevention Tips: What you can do to help prevent influenza and protect yourself from becoming sick.

Questions: If you have additional questions you can call the CDPH novel influenza A (H1N1) virus (Swine Flu) Hotline at 1-888-865-0564, from 8 a.m. to 5 p.m. daily, or contact your local health department.

Vaccine: Novel H1N1 Vaccination Information and Recommendations 

CalPanFlu.org is California’s H1N1 Vaccine Website (Site will be activated September 1): The 2009 Influenza A (H1N1) influenza vaccine is being made available in California through the California Department of Public Health in partnership with local health departments. Healthcare providers and organizations interested in providing this vaccine can pre-register to receive vaccine, place their initial vaccine request, and report doses used through this site. The 2009 Influenza A (H1N1) influenza vaccine cannot be ordered through private organizations.

More Info: More information about novel influenza A (H1N1) virus is available below including information and resources for specific groups.

What's New   

Reported Hospitalized, ICU, and Fatal Cases of Pandemic (H1N1) 2009 Influenza Virus Infections in California, as of August 25, 2009:

1528 hospitalizations, ICU cases, and deaths 

128 deaths

Novel Influenza A (H1N1) Virus - Data and Statistics  

  • Novel Influenza A (H1N1) Virus - Data and Statistics (Current and historical data)
  • Provisional Data Table - August 25, 2009 (PDF)Opens in a new browser window.(Updated weekly) - Reported by local health jurisdictions
  • CDPH Enhanced Surveillance for Pandemic (H1N1) 2009 Virus (PDF)Opens in a new browser window.VRDL - August 20   
  • CDPH News and Updates

  • Letter from Dr. Mark B. Horton to Californians on Upcoming Flu Season (PDF)Opens in a new browser window.- August 25
  • Dr. Mark Horton, director of CDPH, testified on July 29, 2009, before the U.S. House of Representatives Committee on Homeland Security regarding the H1N1 virus. Read the full transcript
  • CDPH Urges Californians to Remain Vigilant About Preventing Spread of Influenza as Novel H1N1 (Swine) Flu Virus Persists - June 25
  • CDPH Statement Regarding the Raising of the Pandemic Alert Level - June 11
  • More News:  Novel Influenza A (H1N1) Virus News Archive

    CDPH Latest Guidances

  • CDPH Pandemic (H1N1) 2009 Influenza Updated Recommendations for Healthcare Settings (PDF)- August 20
  • CDPH Pandemic (H1N1) 2009 Influenza Infection Control Recommendations for Hospitalized Patients (PDF)Opens in a new browser window.- August 20
  • CDPH Pandemic (H1N1) 2009 Influenza Infection Control Recommendations in an Outpatient Setting (PDF)Opens in a new browser window.- August 20
  • CDPH Pandemic (H1N1) 2009 Influenza Infection Control Recommendations in Long-Term Healthcare Settings (PDF)Opens in a new browser window.- August 20
  • CDPH Pandemic (H1N1) 2009 Influenza Health Alert Update for Schools and Local Health Departments (PDF)  - August 13
  • CDPH Pandemic (H1N1) 2009 Health Alert Update for Healthcare Providers and Clinicians (PDF)Opens in a new browser window.- July 22
  • CDC and WHO News and Updates

    CDC continuous updates: Novel Influenza A (H1N1) Virus Investigation Updates in the U.S. (CDC) (also see CDC What's New)

  • Influenza A (H1N1) 2009 Monovalent Vaccine Safety Monitoring: CDC Planning Recommendations for State, Local, Tribal, and Territorial Health Officials - August 21
  • MMWR Early Release: Use of Influenza A (H1N1) 2009 Monovalent Vaccine -- United States, 2009 (CDC) - August 21
  • Guidance for Responses to Influenza for Institutions of Higher Education during the 2009-2010 Academic Year (CDC) - August 20
  • Technical Report on CDC Guidance for Responses to Influenza for Institutions of Higher Education during the 2009-2010 Academic Year (CDC) - August 20
  • Preparing for the Flu: A Communication Toolkit for Institutions of Higher Education (CDC) - August 20
  • Guidance for Businesses and Employers To Plan and Respond to the 2009–2010 Influenza Season (CDC) - August 19
  • Preparing for the Flu: A Communication Toolkit for Businesses and Employers - CDC, August 19
  • MMWR Dispatch: Oseltamivir-Resistant Novel Influenza A (H1N1) in Two Immunosuppressed Patients (CDC) - August 14
  • WHO continuous updates: Novel Influenza A (H1N1) Virus Global Updates - World Health Organization (WHO)

    Information and Resources For Specific Groups