@MasonMarauder @TrumpUndead @jonathanchait Not true. The virus changed, which was the biggest factor. Delta began to infect and transmit from vaccinated people at a high rate which never happened before. That was the primary cause of big surge in summer 2021 after months of low transmission post vax.
@MasonMarauder @TrumpUndead @jonathanchait 不正确。病毒发生了变化，这是最大的因素。三角洲开始以前所未有的高比率感染和传播接种疫苗的人。这是在 vax 后数月的低传播率之后，2021 年夏季大幅上涨的主要原因。