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.
It’s interesting, but trading one strain of flu, which was already on the decline, isn’t a great tradeoff for having covid-19 around. Even if it had died without covid-19 existing, another strain would fill its niche.
It’s interesting, but trading one strain of flu, which was already on the decline, isn’t a great tradeoff for having covid-19 around. Even if it had died without covid-19 existing, another strain would fill its niche.