Fears of contracting AIDS through transfusions have been raised by a report saying an 18-year-old HIV carrier had sold his blood in several Shanxi province cities. Of the province's 134 people with HIV, 132 had been infected through transfusions, said Beijing Youth Daily. The newspaper said although the Ministry of Public Health issued regulations in 1994 to standardise tests for donors to include testing for HIV, illegal centres dealt in blood. The Beijing Red Cross carries out two tests to ensure no one infected escapes detection. But some illegal centres try to cut costs by using a method endangering other donors. In regular centres, blood drawn is circulated in a centrifuge to separate plasma and blood cells. The red cells go back to the donor. 'In order to cut costs, some illegal stations transfuse mixed red cells of many donors back to each individual making it likely to spread infections,' the paper said.