PrEP是疫苗吗？

PrEP是疫苗吗？

不是，PrEP不是疫苗。疫苗通过教会你的身体在几年内抵御感染，而PrEP的作用方式不同。PrEP（暴露前预防）是通过每天服用一颗药丸来降低感染HIV的风险。被证明是安全并有效帮助阻止HIV感染的药物叫做Truvada（发音为tru vá duh）。Truvada是由两种药物组成的，分别是替诺福韦和恩曲他滨。

如果你每天按时服用PrEP，药物会在你的血液中发挥作用，通常可以阻止HIV在体内扎根并传播。然而，如果你漏服药物并且不每天服用PrEP，血液中可能没有足够的药物来阻止病毒，从而降低其效果。

Is PrEP a Vaccine?

No, PrEP is not a vaccine. While vaccines work by teaching your body to fight off infections for several years, PrEP works differently. PrEP (pre-exposure prophylaxis) involves taking a pill every day to reduce the risk of getting HIV. The pill that has been shown to be safe and effective in helping to block HIV infection is called Truvada (pronounced tru vá duh). Truvada is a combination of two drugs: tenofovir and emtricitabine.

When you take PrEP daily, the medicine in your bloodstream can often prevent HIV from taking hold and spreading in your body. However, if you miss doses and don’t take PrEP every day, there may not be enough medicine in your bloodstream to block the virus, reducing its effectiveness.