I mean, to me, that implies that literally, the virus is not circulating at all between humans in China.

我的意思是， 对我来说，这意味着从字面上看，这种病毒在中国根本没有在人与人之间传播。

For our work, it's important to get as many samples from the bats as possible, so we can identify the many types of virus circulating in the population.

就我们的工作而言，从蝙蝠身上获取尽可能多的样本是很重要的，这样我们就可以识别在人群中传播的多种病毒。

In areas with intense transmission rates; in animal populations, for instance in mink farms; and in places with high vaccination rates where the virus is still circulating widely.

在传播率高的地区；在动物种群中， 例如水貂养殖场；在疫苗接种率高但病毒仍在广泛传播的地方。