HIV is a very delicate virus, and chances of transmission of having HIV, from a single unprotected sexual encounter (via vaginal âsex) is 0.04% (female to male) per act, which âis very low to cause a confirmed infection, just by a single actâ.
The fact is having sex once with somebody whom you know to be HIV positive does not guarantee you will get the virus. Continuous and regular sex with a HIV positive person for some time, does increase the chance of acquiring HIV.
There are a lot of instances where HIV negative partners of HIV positive patients, have not acquired HIV via âintercourse. But it does not mean that people should not follow safe sex, and take a risk. The chances that reduce the risk include - low viral loads in the patient, proper anti retroviral therapy for HIV, and following safe sex.
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