Necessary or not, Covid booster shots are probably on the horizon
Dash Hunger, 12, receives the Pfizer-BioNTech Covid-19 Vaccine at the Jewish Federation/JARC's offices in Bloomfield Hills, Michigan JEFF KOWALSKY AFP/File

The drugmaker Pfizer recently announced that vaccinated people are likely to need a booster shot to be effectively protected against new variants of covid-19 and that the company would apply for Food and Drug Administration emergency use authorization for the shot. Top government health officials immediately and emphatically announced that the booster isn’t needed right now — and held firm to that position even after Pfizer’s top scientist made his case and shared preliminary data with them last week. This has led to confusion. Should the nearly 60% of adult Americans who have been fully vacci...