@Robbbie_Strange @therealrthorat @StuartMill1776 @TrumpUndead @jonathanchait That's not correct. Conditions change. Efficacy of vaccines was higher at the beginning and then degraded.
@Robbbie_Strange @therealrthorat @StuartMill1776 @TrumpUndead @jonathanchait 这不正确。条件改变。疫苗的功效一开始就比较高，然后就退化了。