More than 50% of Americans get the flu shot every year, we kind of have some immunity, and, yet, 20K to 60K people die every year, when only 10% get it (due to the flu shots or the immunity). Remove the immunity and flu shot preventing some infection, and even if it's as bad as the flu and doesn't have any permanent damage, which it seems to have, we're still talking hundreds of thousands of dead bodies.