How Effective Are Flu Vaccines?

We finally have a statistical analysis of the 2018-2019 flu seasons. We are in the 2019-2020 seasons now, so this analysis is for the most recently completed season.

Projecting the number of cases has there been no vaccine, the study concludes that the vaccine reduced:

  • Flu illnesses by 45 million;
  • Medical visits for treatment of flu by 2.3 million;
  • Hospitalizations for flu by 58,000; and
  • Deaths from flu by 3,500.

Without a vaccine, would you have been one of these additional casualties? No way to say.

However, that’s a substantial burden of hardship and cost that no one had to carry because of the vaccine.

JR Chung et. al., “Effects of Influenza Vaccination in the United States during the 2018-2019 Influenza Season”, Clin Infect Dis. 2020 Jan 6. pii: ciz1244. doi: 10.1093/cid/ciz1244

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