They later learned that he was not infected.

后来他们知道他没有被感染。

youdao

Those who discover they are not infected can also benefit, by receiving counselling on how to remain uninfected.

未感染HIV病毒的人也可受益，他们可以获得辅导，从而保护自己不被感染。

youdao

Therefore, just because someone's previous girlfriend tested negative for a range of STDs does not mean that that person is not infected.

因此，仅仅因为某人的前女友STD测试阴性并不能证明这个人没有感染。

youdao

The experiment showed that the bite of an infected mosquito was not a safe way to protect people from yellow fever.

VOA: special.2010.05.18

There weren't people that got infected, like you can get infected with hepatitis B or tuberculosis, and not even know you're infected.

这不像人们感染了,像B型肝炎或者肺结核这类病时,都有可能不知道自己被感染了

耶鲁公开课 - 生物医学工程探索课程节选

The experiment showed that was not a safe way to protect people the bite of an infected mosquito from yellow fever.

VOA: special.2009.01.27

Or necessarily getting the prevention messages that they need to protect others who are not infected.

NPR: The Call for Routine HIV Testing Grows in the U.S.

About 10% were infected and another 20% were found to have Acinetobacter bacteria on their skin but were not infected.

FORBES: The Iraq Infection

Fortunately, most animals are not infected with rabies, so transmission to humans is rare, affecting just a handful of people every year.

CNN: Are rabies shots needed for any bat exposure?