"A total of 388 persons have received scam calls in 31 provinces," Bai Hua, the head of Baihualin National Alliance, a nongovernmental organisation that aims to provide assistance to people living with HIV, said.
China's health officials have also complained to police about the alleged leak, which the World Health Organisation and the Joint United Nations Programme on HIV/AIDS yesterday termed as a violation of the fundamental right to patient confidentiality.
"Some HIV-positive persons told me that the scammers knew their names, addresses, the time when they were diagnosed, even the special disease control centre and the doctors who prescribed them medicines," Bai said, adding the leak not only threatens patients' personal lives, but also damages trust between health authorities and patients.
The centre said it has alerted police and encrypted the information because it is illegal to disclose the personal information - including the names, addresses and names of family members - of people living with HIV without their permission.