Now, technically, everyone with COVID-19 starts out symptom-free, or presymptomatic.

现在，从技术上来看，每一个新冠感染者在一开始都没有的，或者说正处于一种前的态。

That is what the second strand of research on the asymptomatic and presymptomatic transmission of SARS-COV-2 deals with.

这关于SARS-COV-2无和前传染的第二部分研究。

It's increasingly clear that a lot of the spread is occuring through presymptomatic people, folks that are in the incubation period, many of whom are not at high risk themselves.

来的，许多传播源临床前期患者，当时这些人处于潜伏期，他们中的许多人本身并不患病的高风险对象。

Now there's a debate about how much asymptomatic people or presymptomatic folks that are in the incubation period are spreading the disease and it may be much more than what was originally thought.

关于无患者或者临床前期患者，即处于潜伏期的患者传染力如何，目前尚存争议，也许情况比我们原想的更严重。