First of all, the mosquito would have to bite a person infected with HIV.
possibly 28 million people on this planet are infected with HIV.
This person would also have to be in a stage of infection when HIV particles are in the blood.
The amount of infectious HIV praticles found in the blood changes over the course of an infection.
The blood taken by the mosquito would have to have HIV particles in it.
Since the mosquito is NOT part of the HIV "life cycle" , the transfer of the virus would be entirely up to chance events.
During a bite, the mosquito injects saliva into your blood. This keeps your blood liquid, and easy for the mosquito to take. The mosquito drinks, and leaves. Any mosquito saliva left is all that could contain a possible HIV particle. It looks like a mosquito does not transfer much from "meal to meal". So, the odds are very minimal of getting AIDS from a mosquito.
These HIV particles would have to somehow get into the saliva of the mosquito, and then be transferred to a new person.
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