There is a risk of HIV transmission from oral sex. If a woman has AIDS, then vaginal secretions will contain HIV. If a man’s mouth is broken, his gums are inflamed or his tonsils are inflamed, HIV will enter his body through these broken wounds and thus infect him with AIDS. The chance of this kind of infection is still relatively low, but it is not absolutely not infectious. There are other ways of transmission, such as occupational exposure of health care workers and medical transmission, etc. The main ways of transmission are blood, sexual contact and vertical transmission from mother to child.