In 2008, Timothy Ray Brown became the first person to be cured of HIV—or so many claim. Brown is known as “the Berlin patient,” and six years on, the virus has still not been detected in his blood. In this Nature Video, reporter Lorna Stewart wants to know the implications of his remarkable treatment. But her dreams of an imminent cure quickly fade as Nobel laureate Françoise Barré-Sinoussi, who discovered HIV, brings Lorna back to Earth with a bump.