HIV crossed from chimps to humans in the 1920's in what is now the Democratic Republic of Congo. This was probably as a result of chimps carrying the Simian Immunodeficiency Virus (SIV), a virus closely related to HIV, being hunted and eaten by people living in the area.
Here are ways to prevent yourself from getting sick:
1) Washing your hands.
2) Going to bed.
3) Avoid making contact with someone that's sick.
Those are a few ways you can prevent yourself from getting sick!
-LizzyIsTheQueen
True, It Helps Protect The Workers From Getting Germs Onto Them And Then Onto The Patient (Which Is Why Healthcare Workers Wear New Equipment, Scrubs Etc.)
It would be D (All of the above)