Eventually, with " fewer susceptible people out and about and mingling, " Navarro says, there was nowhere for the virus to go-the " herd immunity" talked about today.

最终，随着“四处走动，混杂的易感人群越来越少”，纳瓦罗说，已经无处可去——也即已经形成了今天所说的“群体免疫”局面。

And it's so contagious that if people aren't vaccinated, nine out of 10 susceptible people will get infected with the virus if they are exposed.

而且它的传染性很强，人们不接种疫苗，那么十分之九的易感人群一旦接触就会感染。

At that moment, susceptible people become infected at exactly the same rate as infected people become removed.

此时，易感人群被感染的速度与感染者转归的速度完全相同。

First off, we can subtract the final fraction of susceptible people from the whole, to find the total number of people who became infected during the outbreak.

首先，将感染者清零后所剩的易感人群人数从总人数中减去，我们就算出在疫情中有多少人曾被感染。

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率大约是此前的两倍，因为只有大约一半的人群是易感的。

Like, if there's a lot of susceptible and infectious people, more susceptible people will become infected, so the number of susceptible people declines more quickly.

比，有很多感染和易感染人群，更多的易感者会被感染，所以易感人群的数量会下降得更快。

Eventually, at the peak of the outbreak, since there are fewer susceptible people to become infected, infections don't happen as often, which creates a turning point.

最终，在疫情的高峰期，由于感染的易感人群减少，感染不会经常发生，这创造了一个转折点。

During the AIDs pandemic of the 1980s, public health agencies in many countries either couldn't, or wouldn't, properly engage with groups who were susceptible.

在 20 世纪 80 年代的艾滋疫情期间，许多国家的公共卫生机构要么不，要么不愿与易感人群进行适当的接触。

So, the number of susceptible people declines over time, proportional to how many people are in both of these groups.

因此，易感人群的数量随着时间的推移而减少，与这两个群体中的人数成正比。

The average age of susceptible people has cracked up For a variety of reasons.

易感人群的平均年龄已经上升，原因多种多样。

These simulations represent what's called an " SIR model" , meaning the population is broken up into three categories, those who are susceptible to the given disease, those who are infectious, and those who have recovered from the infection.

这些模拟代表了所谓的“SIR模型”， 意味着人群被分为三类，一类是对特定疾易感的人，一类是具有传染性的人， 还有一类是从感染中恢复的人。

Arthur paused in surprise. Susceptible persons are more affected by a change of tone than by unexpected words, and Arthur had the susceptibility of a nature at once affectionate and vain.

亚瑟惊讶地停了下来。易感的人更容易受到语气变化的影响，而不是意想不到的话语，而亚瑟天生易感，既深情又自负。

You are amiable, Don Lorenzo: Antonia has a susceptible, a loving heart, and is grateful for the favours conferred upon us by your interference with the Marquis.

你很和蔼可亲， 唐·洛伦佐：安东尼娅有一颗易感的、充满爱心的心， 感谢你干涉侯爵给我们带来的恩惠。

But so by the time people get to 21 or so, they've settled into a very stable degree of hypnotizability from low to medium to high.

但到了21岁左右，人们已经稳定在较低、中等或较高的催眠易感程度上。

At the same time though, there is plainly some genetic differences across human groups and say with regard to vulnerability to disease.

同时，很明显不同人类群组之间存在一些基因差异， 包括对疾易感方面的差异。

" Susceptible" is usually used when talking about, for example, an illness or a sickness, or something negative in your behavior.

“易感的”通常用于谈论例疾或某种行为中的负面情况。

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。

And then the last, and the most important -- and it's often overlooked -- is the density of susceptibles.

最后一点，也是最重要的一点——却常常被忽视——那就是易感人群的密度。

The pathogen doesn't have enough susceptible people to keep infecting, so it stops spreading.

原体没有足够多的易感 人群继续感染，因此它停止传播。

To sustain themselves, they need a human population that is sufficiently numerous, and sufficiently densely packed, that a numerous new crop of susceptible children is available for infection by the time the disease would otherwise be waning.

为了维持生存，他们需要足够多、足够密集的人口，以便在疾减弱时，有大量新的易感儿童可供感染。