Can mosquito bites transmit the HIV virus?

Generally speaking, mosquito bites usually do not transmit the HIV virus. The detailed explanation is as follows:

HIV cannot survive or replicate inside mosquitoes. The survival of HIV depends on the specific environment provided by human immune cells, while the digestive system and internal cells of mosquitoes lack such conditions. The virus will be digested and broken down, losing its infectious activity. Moreover, the processes of blood sucking and blood injecting in mosquitoes are separate. The mosquito's mouthparts contain a food canal used for sucking blood and a salivary canal responsible for secreting saliva to prevent blood coagulation; these two channels are independent. Therefore, mosquitoes cannot inject previously ingested blood back into a human body, meaning they cannot transfer the virus to the next person they bite. Additionally, a certain quantity of virus must reach susceptible areas of the human body to cause infection. The amount of blood ingested by a mosquito during each feeding is extremely small, and the quantity of HIV it contains is far below the infectious dose. The residual amount of blood left on the mosquito's mouthparts is even smaller, with the viral load practically negligible and insufficient to overcome the defenses of the human immune system and cause infection.

Although mosquito bites do not transmit HIV, it is still important to take measures to prevent mosquito bites and protect against other mosquito-borne diseases, such as malaria and dengue fever. At the same time, one should avoid scratching the skin due to itching caused by mosquito bites, which can lead to skin damage and bacterial infections.