The NFL is requiring players and other key personnel to receive a booster dose of a COVID-19 vaccine as part of the league mandate to be fully vaccinated, according to a league memo.
Multiple outlets released the contents of the memo, which coincided with a noticeable uptick in reported positive tests around the league.
"On November 29, the CDC issued a study showing that the effectiveness of the approved COVID-19 vaccines may decrease over time and has recommended that all eligible vaccinated individuals over the age of 18 should receive a booster shot," the memo reads in part. "Given the increased prevalence of the virus in our communities, our experts have recommended that we implement the CDC's recommendation."