Mosquitoes do not cause the transmission of HIV, which is theoretically not feasible and clinically not available. First, the mosquito is not a suitable host for HIV, mosquitoes in the blood of AIDS patients after sucking, HIV in the mosquito body will not appear to multiply, will slowly disappear within a few hours or days on its own. Secondly, the mosquito’s mouthparts and esophagus is not the same pathway, so the last sucked patient’s blood, and will not be directly injected into the next sucked patient body. Finally, even if the mosquito sucked the blood of AIDS patients, AIDS patients’ blood for a long time in the mosquito mouthparts, due to the long exposure of HIV in the air, but also lost the infectious.