An infected person can pass the virus through sex.

艾滋病感染者可以通过性行为传播艾滋病病毒。

Contact tracers search for individuals who may have come in contact with an infected person.

负责追踪接触者的工作人员要寻找可能与感染者接触过的人员。

Chinese health officials publicized the infected person's recent travel history, starting with their home.

中国卫生部门官员公布了这名感染者最近的旅行史——从他们的家开始。

The virus is spread by droplets from an infected person's mouth when they cough.

这种病毒通过感染者咳嗽时产生的飞沫传播。

And that's basically how many people an infected person goes on to infect themselves.

大意就是已感染者可继续感染的人数。

Tracers try to contact every person who came within two meters of an infected person.

追踪者试图与每一个曾与感染者相距两米以内的人取得联系。

This is an event where one infected person may have passed the virus to many others.

这个事件中一位感染者可能把病毒传染给很多人。

Measles is a virus. It lives in the nose and throat mucus of an infected person.

麻疹是种病毒。它存在于感染者的鼻子和喉咙粘液中。

So if R were three, then a single infected person infects three susceptible people on average.

所以如果 R 是三，那么一个感染者平均会感染三个易感者。

See, the flu is spread through internal contact with fluids produced by the infected person's respiratory system.

看，流感就是从已经感染的人的呼吸系统中产生的液体进行传播的。

The virus can live for up to two hours on surfaces where the infected person coughed or sneezed.

这种病毒可以在感染者通过咳嗽或打喷嚏所沾染物体的表面存活2个小时。

The reaction, called alpha-gal syndrome, happens when an infected person eats beef, pork, or other meat of mammals.

这种反应被称为α-半乳糖综合征，当感染者食用牛肉、猪肉或其他哺乳动物的肉时就会出现这种反应。

When an infected person sneezes or coughs, the viruses leaves the lungs and get released into the air.

当感染者打喷嚏或咳嗽时，病毒就会从肺进入空气。

The virus can also be transmitted through contact with the oral or skin lesions of the infected person.

接触患者口腔或皮肤破损处也可以感染病毒。

Dr. Fauci estimates that for every person who gets into treatment, up to two more are newly infected.

弗契博士估计每有一个人开始治疗，就有另外两个新感染上。

People can catch Ebola if they come into contact with body fluids or something contaminated by an infected person.

如果人们接触到被感染者的体液之类的东西，就会感染上埃博拉病毒。

So, the infected person may not know they are sick and then pass the virus to others.

因此，感染者可能不知道自已患病，还会将病毒传染给他人。

There are many dangerous diseases a person can get when he or she has sex with an infected person.

一个人同受感染者发生性关系之后，可能感染多种危险疾病。

This is similar to what might happen if an infected person coughs or expels the virus into the air.

这类似于感染者咳嗽或使病毒进入空气时可能发生的情况。

If an infected person gets bitten by a mosquito, the parasite gets picked up along within the blood meal.

如果蚊子叮咬被感染者，寄生虫就会顺着血管传染给蚊子。