HIV spreads through bodily fluid exchange, but why can’t mosquitoes sucking blood spread it?

Question

HIV spreads through bodily fluid exchange, but why can’t mosquitoes sucking blood spread it?

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Answer 1

The HIV virus binds to certain cell receptors and replicates. Mosquitoes don’t have the correct receptors for HIV so the virus can’t attach to their cells and can’t replicate. Instead, any virus that gets into a mosquito simply gets digested with everything else. Even if there was a tiny bit of undigested virus left in the mosquito when it bit you, it wouldn’t be a big enough viral load for you to get HIV.