What is the purpose of pre-exposure prophylaxis

Pre-exposure prophylaxis, or PrEP, is a way for people who do not have HIV but who are at substantial risk of getting it to prevent HIV infection by taking a pill every day. The pill (brand name Truvada) contains two medicines (tenofovir and emtricitabine) that are used in combination with other medicines to treat HIV.

Blood transfusions were rarely done and often fatal; they were outlawed until the nineteenth century.

True your body needs vitamins such as protein, vitamin d, fish oil etc