How long can blood sit on a computer keyboard before HIV dies? Can I catch the virus if I use the keyboard two hours after someone got blood on it?
The HIV virus is very fragile and does not survive well outside the human body. You cannot catch HIV from a computer keyboard, toilet seat, water fountain, etc. HIV is spread by sexual contact with an infected person, by sharing needles and/or syringes (primarily for drug injection) with someone who is infected, or, less commonly (and now very rarely in countries where blood is screened for HIV antibodies), through transfusions of infected blood or blood clotting factors. Babies born to HIV-infected women may become infected before or during birth or through breast-feeding after birth.
