Scientists at an international conference in Philadelphia say they believe a vaccine against the HIV is now feasible....
David Baltimore, one of the conference organisers, told the BBC he was "optimistic, in a way that I wasn't a couple of years ago" that vaccines being tested now "will be able to provide a level of immunity and that will make a difference, both in the United States and abroad".
from http://news.bbc.co.uk/hi/english/world/americas/newsid_1527000/1527826.stm