Why Mosquito bite can't cause AIDS? Please help in finding the answer

Hello All,

I have a curious question (not asked in any assignment). I have always wondered as to why Mosquito bite doesn't cause AIDS? What if a Mosquito bites an AIDS patient and then bites a healthy person? The blood carried by the mosquito won't transfer the virus? I know it is established that mosquito bite can't cause AIDS, but can anyone help me in getting my concept cleared about why it is not possible ?

Looking forward to your response.

Thanks

Rajni