@Loretta_Torrago @SixandLaura @LolaMotz @boggleknits @BernieDogs4 @nohomelikeplace @wsbgnl I don't know about the whole theory but #4 is certainly plausible. May have been less transmissible and/or less severe, resulting in only small, low-impact and often self-limiting outbreaks that wouldn't necessarily be noticed.
@Loretta_Torrago@SixandLaura@LolaMotz@boggleknits@BernieDogs4@nohomelikeplace@wsbgnl我不知道整个理论，但#4确实是合理的。可能传播性较低和/或严重程度较低，只会导致小规模、低影响且通常自我限制的暴发，不一定会被注意到。