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

[ad_1] cnn — For 10 years, Americans have had access to flu vaccines that protect against four strains of the virus: two A strains and two B strains. However, starting this fall, all flu vaccines distributed in the United States will likely contain only three strains, and the change is due to Covid-19. In 2020, … Read more