Donald G. Mcneil Jr.:
When scientists made the stunning announcement last year that a baby born with H.I.V. had apparently been cured through aggressive drug treatment just 30 hours after birth, there was immediate skepticism that the child had been infected in the first place. But on Wednesday, the existence of a second such baby was revealed at an AIDS conference here, leaving little doubt that the treatment works. A leading researcher said there might be five more such cases in Canada and three in South Africa.