Currently, none of the evidence on asymptomatic transmission is watertight.

目前，关于无症状传染证据没有一个是无懈可击。

Old and new diseases compound each other.

传统传染性疾病与近年来非传染性疾病同时困扰着发展中国家。

All virtual facing a seemingly never-ending contagion.

实际上，我们面对着一场不停止传染病。

The pleasure of connection seems contagious.

联系乐趣是可以传染。

The virus cell that was sneezed into your lungs is sneaky.

由喷嚏传染病毒胞会偷偷摸摸进入你肺中。

It's not clear whether they were infectious.

病毒传染性还不得而知。

They're having fun, and as the audiences' exuberant reactions indicate, the fun is contagious.

他们很开心，正如观众们热情反应表明那样，快乐是会传染。

The oldest form of empathy is contagious fear.

同理心最古老一种形式 就是具有传染力恐惧。

Scientists use it to describe how contagious a disease is.

科学家用它来说明一种疾病传染能力。

Some of the mutations have been associated with higher transmissibility.

其中一些突变可能会有更高传染性。

Yes, yawning is a very contagious behaviour.

是，打哈欠是一种传染性很强行为。

Fortunately, while Ebola is highly virulent, several factors limit its contagiousness.

幸好，虽然埃博拉极度致命，但它传染性被以下因素所限制。

I-I-I basically mixed this with a more contagious flu virus.

我加入了一种更具传染性流感病毒。

Systems are being put in place to spot potentially pandemic diseases and stop them quickly.

就识别有潜在威胁传染病、防止大规模传播扩散工作进行了体系部署。

I think you have chicken pox! You are contagious! Get away! Don't breathe on me!

我觉得你可能长水痘了！会传染！快走开！不要对着我呼吸！

She says anti-mask feelings stem partly from perceptions of low disease risk.

她说反对口罩观点，某种程度上来自于低传染风险认知。

He said chronic infections can worsen the effects of noncommunicable diseases that accompany urbanization.

他表示慢性感染会伴随城市化影响加重非传染性疾病发病几率。

This year America has had its second greatest number of diagnosis since the year 2000.

今年，美国爆发了自2000年以来第二大规模麻疹传染。

They're not certain how contagious people are when they get it.

当有人感染时，他们也不能确定这些感染者传染性有多强。

An epidemic that would be more infectious and would spread faster than Ebola did.

一种比埃博拉更具感染性更能快速传播传染病。