It is possible that a person can get infected with HIV if any body liquid with the virus gets into their body. The body liquids that carry HIV are blood, semen, liquid from the vagina, and breast milk. The liquids can go into the body through injured skin. The liquids can also enter through the mouth, eyes, nose, vagina, anus, or penis. However, though HIV might enter the body through any of these places, when people get HIV by having sex, the virus usually enters the body through the vagina or anus.