当初印度就是这种情况:在大量没有打疫苗人群中海啸般感染,然后病毒变异成 Delta 强毒株。
所有跟帖:
• 那时没omicron,强毒易被弱毒株取代。 -Clivias007- ♂ (0 bytes) () 12/24/2022 postreply 13:47:18
• 那时没omicron,强毒易被弱毒株取代。 -Clivias007- ♂ (0 bytes) () 12/24/2022 postreply 13:47:18
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