HIV is not contagious in water. HIV must be present in large amounts and come into direct contact with the broken skin or mucous membranes of other people to cause transmission. It can be seen in the blood of a person with AIDS, or in the secretions of the reproductive tract, breast milk, etc., as can chest and abdominal fluids or cerebrospinal fluid. In daily life, even if body fluids get into the water and are relatively fresh, water has a diluting effect and exposure to other people’s wounds is so small that it is basically impossible to cause infection. In daily life, having saliva contact with HIV patients will not cause infection either. If the corresponding dilution of HIV, the possibility of causing infection is also basically not, only when the amount is relatively large and the concentration is relatively high. HIV is very weak in the outside environment, and in water if it lasts longer, HIV has lost the corresponding infection vitality, and it is more unlikely to cause infection. For HIV, through the outside environment to cause infection, it is impossible to see things.