We might start social distancing, for instance, or the disease might enter a new susceptible population.

例如，我们可能会开始社会距离，或者疾病可能会进入一个新的易感人群。

Instead, we'd say the incidence for the susceptible population is about twice as high, since only around half of the population is susceptible.

相反，我们会说易感人群的发病率大约是此前的两倍，因为只有大约一半的人群是易感的。

So we are what's called the susceptible population, meaning not any of us at the beginning of this had immunity.

所以我们是所谓的易感人群，这意味着我们中的任何人在这开始时都没有免疫力。