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Injection on a Human Arm.

(Getty Images)

We’re wrapping up a second full flu season in the middle of a pandemic, and like 2020-2021, the latest season has proved to be thankfully light, with just 5.2 hospitalizations for the flu per 100,000 people — the lowest rate in years.

It’s a good thing, because new findings suggest the vaccine developed for this season was not a particularly good match for prevailing strains. Flu shots did not reduce the risk of mild or moderate flu caused by the H3N2 virus, though it’s not clear yet whether they prevented severe flu outcomes.

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Each year, flu vaccine developers must predict which viral strains are likely to be most prevalent and plan accordingly. Efficacy typically ranges between 40 and 60 percent.

Source: This post first appeared on sandiegouniontribune.com

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