Where did STI/STDs come from? Since they are created via giving to someone who has already contracted it
So where did they originate from?
In: Biology
I don’t think this is a great conversation for a five year old.
It varies. HIV is also spread by blood. That’s probably how it crossed species in the first place, crass jokes aside. Syphilis is believed to have come from South America, where it was a skin disease that thrive in the most environment. When it was transmitted to the old world by European explorers, it struggled in the drier parts of the world, so it adapted to moister body parts such as the genitalia. Herpes is spread by skin contact. In fact there are two varieties of HSV that are common today, one of which has is most common in the mouth, the other in the genitals. The latter just specialized to that region because humans commonly have skin to skin contact with their genitals.
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