Despite some confusion around changing vaccine guidelines, the CDC still recommends an annual flu shot for everyone 6 months and older.
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Part of the problem was a mismatch between the influenza strains circulating and the vaccine available. Here’s how annual flu shots are formulated.
There are many flu strains, and those strains can also change and mutate.
New genetic technologies are letting us look at flu evolution right where it starts: within individual people, while they’re sick.
The flu vaccine – which prevents one from getting influenza – changes every year, because it is based on the strains of the virus that presented in the previous year.
Top contributors
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Medical Epidemiologist at the National Institute of Communicable Diseases and Lecturer at the School of Public Health, University of the Witwatersrand
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Professor Emerita of Biology, Indiana University
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Associate Member, Fred Hutchinson Cancer Research Center and Affiliate Associate Professor of Genome Sciences and Microbiology, University of Washington
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Adjunct Associate Professor, Faculty of Medicine
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Virologist, The University of Queensland
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Doctoral Student in Genome Sciences, University of Washington
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Professor of Nursing, Purdue University