How is H1N1 influenza (swine flu) prevented?

Updated: Apr 09, 2019
  • Author: Michael Stuart Bronze, MD; Chief Editor: Russell W Steele, MD  more...
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A systematic review and meta-analysis has reported on the immunogenicity and safety of the 2009 influenza A (H1N1) vaccine. No death or case report of Guillain-Barre syndrome was reported, and the vaccine, with or without adjuvant, appeared to be generally seroprotective after one dose among patients older than 36 months. [36]

After the initial year H1N1 influenza reappeared in 2009, the A/California/7/2009 (H1N1)pdm09-like strain has been incorporated into seasonal influenza vaccines. All persons aged 6 months or older should receive influenza vaccine annually. The vaccine viral strains recommended by the World Health Organization and the Centers for Disease Control and Prevention (CDC) for the 2016-2017 Northern Hemisphere influenza season differ from those for the Northern Hemisphere 2015-2016 influenza season, but are the same as the 2016 Southern Hemisphere influenza season. [37]

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