Will You Need a Booster Shot of the COVID-19 Vaccine?

When the first COVID-19 vaccines from Pfizer-BioNTech and Moderna were authorized by the U.S. Food and Drug Administration in December 2020, most people breathed a sigh of relief since both shots were shown to be between 94% and 95% effective in protecting from COVID-19 symptoms. But public health experts warned that nobody really knew how … Read more