Frederic Bushman of the Perelman School of Medicine spoke about viral variants and the duration of COVID-19 vaccine efficacy. “We have it in our power to strongly influence the situation by getting vaccinated, wearing masks, and engaging in all the precautions we’ve been hearing about,” he said.
https://whyy.org/articles/will-i-need-to-get-a-covid-19-booster-shot/ WHYY (Philadelphia)