@benny171a @TrumpUndead @jonathanchait Durability of vaccine immunity over time and variants, initially delta, which was the first to widely infect vaccinated people.
@benny171a @TrumpUndead @jonathanchait 疫苗免疫力随时间和变体的持久性，最初是 delta，这是第一个广泛感染接种疫苗的人。
@benny171a @TrumpUndead @jonathanchait Durability of vaccine immunity over time and variants, initially delta, which was the first to widely infect vaccinated people.
@benny171a @TrumpUndead @jonathanchait 疫苗免疫力随时间和变体的持久性，最初是 delta，这是第一个广泛感染接种疫苗的人。