Mosquitoes do not transmit HIV. On the one hand, mosquitoes cannot serve as a host for HIV, and on the other hand, the mosquito’s mouth and esophagus are not a single pathway. Mosquitoes generally do not cause the transmission of AIDS, on the one hand, even if the mosquito last bite the existence of AIDS, HIV through the blood can enter the mosquito body. However, HIV is not able to parasitize in mosquitoes, mosquitoes can not serve as a host for HIV, and HIV will gradually lose its activity within a few days. In addition, the mosquito’s mouth and esophagus is not a pathway, even if the blood just inhaled, will enter the mosquito body. And when continuing to suck the next person, the previous blood does not flow out through the mosquito’s mouth and cause the virus to spread.