Viruses mutate all the time but only some mutations affect their ability to spread or evade prior immunity from vaccination or infection, or the severity of disease they cause. 除非渠有一个全新变种”Pi/Sigma”…即系点变都系omicron..只系传播力会增加，越嚟越难清零啰
Viruses mutate all the time but only some mutations affect their ability to spread or evade prior immunity from vaccination or infection, or the severity of disease they cause. 除非渠有一个全新变种”Pi/Sigma”…即系点变都系omicron..只系传播力会增加，越嚟越难清零啰
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