Post-Pandemic Recommendations for Surveillance and Vaccination
Last updated December 16, 2010. At the current time, this content is considered historical and will not be updated until further notice.
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The WHO declared the end of the H1N1 pandemic on August 10, 2010. The 2009 H1N1 virus is expected to continue to circulate as a seasonal virus during the years to come and is now included in seasonal influenza vaccinations.
In the post-pandemic period, the WHO recommends the following to health authorities (WHO 2010: WHO recommendations for the post-pandemic period):
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Monitoring of respiratory disease activity
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Unusual events, clustering, or outbreaks should be investigated. In addition, appropriate channels for communication and data transmission should be used, such as FluID, FluNet and EUROFlu.
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The WHO should be notified immediately if sustained transmission of antiviral-resistant H1N1 is detected, human cases of any influenza virus not currently circulating are detected, or if any notable changes in the severity or other epidemiologic or clinical characteristics of the pH1N1 2009 virus are detected.
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Key aspects of influenza and its prevention that should be emphasized to all healthcare providers include:
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The pH1N1 2009 virus should be monitored for important genetic, antigenic, or functional changes such as altered antiviral drug sensitivity.
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Vaccination of high-risk individuals
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pH1N1 2009 will continue to circulate in some parts of the world. In some countries, trivalent vaccines that cover pH1N1 2009 virus are available. However, in some countries seasonal influenza vaccine is not available. The WHO advises using the monovalent H1N1 vaccine where available to immunize high-risk persons, especially when trivalent seasonal influenza vaccine is not available.
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The 2010-11 seasonal influenza vaccine will contain an influenza A (H1N1) California/7/2009-like strain, which was also the strain used for the 2009 pandemic H1N1 monovalent vaccines.
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