How AIDS is spread
Basically, it is not AIDS but HIV that spreads through blood, semen and from a mother to child. Mosquitoes cannot transmit HIV for two reasons. Firstly, when the mosquito bites with its probosis, it draws blood and injects saliva, which contains antiviral factors and immunoglobulins and hence cannot transmit HIV. The blood from one person is not injected into the mosquito’s next victim. Secondly, HIV dies in the mosquito’s body because the mosquito after sucking the blood digests the blood and doesn’t immediately need to feed on another. Therefore, it takes a while to digest this blood and by then, it has also digested all the virus containing cells.