Mosquito bites do not transmit AIDS because HIV cannot survive in mosquitoes and cannot transmit AIDS. The main diseases transmitted by mosquito bites are malaria, filariasis, epidemic B encephalitis, yellow fever and dengue fever. The transmission of AIDS includes blood, sexual transmission, vertical transmission from mother to child. There is no relevant literature to prove that mosquito bites can cause the transmission of AIDS. The reason for this is probably because mosquito bites suck up tiny amounts of human blood, which contains very little virus, not enough to make healthy people sick. HIV often exists in blood, semen, vaginal secretions, safe blood donation, use condoms during intercourse, can prevent HIV infection. In order to avoid mosquito-borne diseases, we should pay attention to mosquito prevention and control in the summer, and need to wear anti-mosquito clothing when entering and leaving areas with a high incidence of disease, spray mosquito repellent, and take medication if necessary, to achieve maximum prevention.