Professor Tony Pinching, director of immunology at St. Bartholomew's Hospital, London, urged symptomless HIV-positive individuals to "hang around" after publication of research showing the drug AZT failed to stop the development of AIDS.
Thousands of people are taking AZT
, manufactured by Wellcome, in hope of delaying development of the disease, which occurs on average about 10 years after exposure to the virus.
said: "The necessity to do something should not be presumed.
added that the latest three-year international study, involving 1,749 people, had "brought us back to earth."