As people decide whether to receive their second COVID booster shot, scientists are learning more about their efficacy. WHYY’s Zoe Read explains what we know so far.
(Original air-date: 4/21/22)
As people decide whether to receive their second COVID booster shot, scientists are learning more about their efficacy. WHYY’s Zoe Read explains what we know so far.
(Original air-date: 4/21/22)