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When Is Flu Season?

How Long Does a Flu Shot Last?

The kind of flu that spreads around may change yearly. Scientists usually alter certain things in the vaccine to suggest which strain will occur when the next season arrives. Let’s observe how the flu seasons have been in the last ten years:

2018-2019 Flu Season

  • Peak: Mid-February
  • Most popular strain: Influenza A—both H3N2 and H1N1

2017-2018 Flu Season

  • Peak: January and February
  • Most popular strain: Influenza A (H3N2)

2016-2017 Flu Season

  • Peak: Mid-March
  • Most Popular strain: Influenza A (H3N2)

2015-2016 Flu Season

  • Peak: Mid-March
  • Most Popular strain: 2009 H1N1 influenza A

2014-2015 Flu Season

  • Peak: Late December
  • Most Popular strain: Influenza A (H3N2)

2013-2014 Flu Season

  • Peak: Late December
  • Most Popular strain: 2009 H1N1 influenza A

2012-2013 Flu Season

  • Peak: Late December
  • Most Popular strain: Influenza A (H3N2)

2011-2012 Flu Season

  • Peak: Mid-March
  • Most Popular strain: Influenza A (H3N2)

2010-2011 Flu Season

  • Peak: Early February
  • Most Popular strain: Influenza A (H3N2)