Needle exchanges, if they are free and anonymous, can reduce the need to share needles. It will also reduce reusing needles because people can exchange used for new. This practice will reduce the spread of HIV because there will be less dirty needles on the street. People will be able to get clean needles free of charge.
No. Needle exchanges may help to delay the onset of HIV and AIDS, however I don't feel that we can look at them as fighting the diseases. Needle exchanges come at a large cost to the tax payer, and I feel that our tax dollars could be better spent on rehabilitation programs for those who seek them.