Influenza B

Although influenza B can make you just as sick as A, it has never triggered a worldwide pandemic. Those have all come from the influenza A strains - Michaeleen Doucleff

Influenza B
Influenza B

image by: Klinik Lai 赖氏诊所 at Setia Tropika

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Influenza B is trying to escape our vaccine

The B viruses are less diverse and mutate more slowly, which makes them generally less dangerous. We also get to pick two B strains every year, since the majority of people in the U.S. get a quadrivalent vaccine (meaning it has four parts). Most years there are relatively minor changes to the B virus genome, and therefore small changes to the viruses contained in the vaccine.

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 Influenza B is trying to escape our vaccine

The B viruses are less diverse and mutate more slowly, which makes them generally less dangerous. We also get to pick two B strains every year, since the majority of people in the U.S. get a quadrivalent vaccine (meaning it has four parts). Most years there are relatively minor changes to the B virus genome, and therefore small changes to the viruses contained in the vaccine.

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