Dearth Of Seasonal Flu Adds Uncertainty To Vaccine Strain Selection For Next Season

 
• By Sue Sutter

Low influenza activity in the face of COVID-19 mitigation measures has made it more difficult to predict which strains may become predominant, but US FDA advisory committee unanimously endorses WHO recommendations for influenza A and B strains to be included in US trivalent and quadrivalent vaccines.

Influenza vaccine
With far less influenza circulating this year, it's harder to decide what strains to include in the vaccine for next year. • Source: Shutterstock

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