The Eighth International Conference on AIDS was originally scheduled to be held in Boston. But the organizers, angered by a U.S. policy prohibiting entry by people infected with HIV, the AIDS virus, moved it. So it was that more than 11,000 scientists, policymakers and activists trooped to Amsterdam instead to exchange the latest information:
-- Doctors reported more than two dozen cases of AIDS-like symptoms in patients who test negative for HIV. The cause is unknown: it could be a new version of HIV (two are already known) or an evolved form of an existing one. It could be a completely...