The Biden administration’s plan to start rolling out Covid-19 booster injections next week has drawn criticism from some who claim there is not enough evidence to show they are needed. While breakthrough infections among fully vaccinated people have increased, most of these cases are not serious. The purpose of vaccines, say reviewers of the recalls, is to prevent hospitalizations and death, not cold symptoms.
But many people fully vaccinated in recent months have reported being critically ill with Covid, but not to the point of requiring hospitalization. Boosters should help reduce the number of these cases. They could also prevent people from experiencing certain complications that sometimes follow a severe case of Covid.