From Reuters:
A group of Chinese HIV/AIDS sufferers appealed on Wednesday for police to release their relatives, detained after trying to complain to Premier Wen Jiabao about a hospital they said spread the HIV virus.
Wen visited Hebei province, next to Beijing, on April 5, and some residents of Shahe in the province’s south hoped to use the rare visit by the top leader to complain about a hospital whose blood transfusions they blame for spreading HIV among them and their families, said their lawyer Jiang Tianyong.
Police detained 11 petitioners at the time and seven or eight remained in detention, said Jiang.