The more people who have the virus, the more virus particles there are for that one, fatal mutation to appear in.

感染该病毒的人数越多，就会有越多的病毒颗粒，它们累积在一起引发最后那次致命变异的几率也就越大。

youdao

"If there is a slight mutation in the ion channels in your heart, that's very likely to be a fatal mutation," Markham said.

马克·汉姆表示：“人类心脏的离子通道发生细微变化都很可能是致命的。”

youdao

Although information on all these cases is incomplete, several viruses showing the same mutation were detected in fatal cases, and the mutation has also been detected in some mild cases.

虽然有关所有这些病例的资料尚不完整，但在死亡病例身上已发现有若干病毒呈现出同样的变异，在一些较轻病例身上也发现了病毒变异情况。

youdao