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Content on this page was developed during the 2009-2010 H1N1 pandemic and has not been updated.

  • The H1N1 virus that caused that pandemic is now a regular human flu virus and continues to circulate seasonally worldwide.
  • The English language content on this website is being archived for historic and reference purposes only.
  • For current, updated information on seasonal flu, including information about H1N1, see the CDC Seasonal Flu website.

H1N1 Flu Clinical and Public Health Guidance

Vaccination Guidance for State, Local, Tribal and Territorial Health Officials

Epidemiology and Surveillance

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Clinician Guidance

Clinician Guidance for Specific Audiences

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Infection Control

Laboratory Testing

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Guidance for Patients

Guidance for Pregnant and Breastfeeding Women

Business and Employer Guidance

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Emergency Personnel Guidance

Guidance for Community Settings

Guidance for Child Care Programs, Schools, Colleges and Universities

Travel & Travel Industry Guidance

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