2021-22 Flu Vaccine Less Effective Against Current Virus - MD Magazine

As influenza A(H3N2) remains the most prevalent subtype in the US, investigators estimated the available flu shot is not significantly preventing positive cases.

Interim estimate data for the 2021-22 US influenza season suggest the available flu vaccine did not provide significant efficacy in preventing outpatient medically-attended illnesses. The new Center… [+4454 chars]

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