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The Covid-19 pandemic killed off one strain of the flu, and that will change the next vaccines

www.cnn.com The Covid-19 pandemic killed off one strain of the flu, and that will change the next vaccines | CNN

For 10 years, Americans have had access to flu shots that protect against four strains of the virus: two A strains and two B strains. Starting this fall, however, all the flu shots distributed in the United States will contain only three strains, and the change happened in part because of Covid-19.

The Covid-19 pandemic killed off one strain of the flu, and that will change the next vaccines | CNN
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