More than 80 % of China 's 1.3 billion people are now over the age of 60 . Among new HIV-positive cases nationwide , those over the age of 50 accounted for almost 15 % at the end of 2009 -- a sharp rise from less than 8 % just four years earlier , according to a recent report by the Chinese Center for Disease Control and Prevention . Among new HIV - positive cases , people over 50 account for almost 15 % in 2009 . United Nations has estimated 780,000 people will be living with the HIV virus in China . China : Cheap sex with prostitutes and lack of safe sex knowledge puts elderly at risk .
More than 80 % of China 's 1.3 billion people are now over the age of 60 . Among new HIV - positive cases , people over 50 account for almost 15 % in 2009 . United Nations has estimated 780,000 people will be living with the HIV virus in China . China : Cheap sex with prostitutes and lack of safe sex knowledge puts elderly at risk .