Russia's AIDS epidemic is at a dangerous tipping point after the number of people registered HIV-positive passed the 1 million mark, the country's top AIDS specialist said on Thursday, warning the rate of infection had reached record levels. Russia registered its millionth HIV-positive patient -- a 26-year-old woman in the south of the country -- on Wednesday, Vadim Pokrovsky, the head of the federal AIDS centre, told Reuters in a phone interview. But he said the real number of HIV-positive Russians could be as high as 1.5 million, or 1 percent of the population, based on his and other expert...