Chinese scientists have begun testing a SARS (news - web sites) vaccine on four volunteers at a Beijing hospital, state media said Sunday, in what appears to be the first such experiment on humans. The volunteers, all in their 20s, were injected with the vaccine on Saturday at the Sino-Japanese Friendship Hospital under tight security, reported the Beijing Youth Daily and the Guangzhou Daily, two of China’s largest newspapers. A hospital official, contacted Sunday, said she could not confirm that the tests took place. Roy Wadia, a Beijing-based spokesman for the World Health Organization, said he believed China is the first to get to the human testing stage.
