child when it was born so they can go back and retest. that's where a lot of the skepticism kind of comes in here. the researchers say when this baby was born they tested it twice. both were positive. and then over the next month they tested three more times again, those were positive. but then at five months, they tested the child again, the results were negative. and have remained negative even with no medication. listen. >> to be off the therapy for 10 months is much longer than we would have anticipated any child would ever be able to go off therapy. so this case still informs us in terms of treatment strategy for children, again, if it with be replicated. >> we should mention the first cure case of h.i.v. happened to a man in berlin. a middle aged man given bone marrow transplant. that's him right there. he got the marrow from someone who is naturally resistant to h.i.v. he remains h.i.v. negative to this very day.