As the world marks an international Aids day, Panorama reports on the relentless spread of the disease into the general population. In this country, the authorities are still not encouraging those who think they might have the virus to get tested. Reporting from Sweden and California as well as Britain,
Nisha Pillai finds very different approaches to combatting Aids and asks whether here, too, it's time to take the test.
Producer Charles Furneaux Editor Mark Thompson