The founder of the Indian Health Organisation, Ishwar Gilada, was arrested in April 1999 for administering Manisyl, a bovine immunodeficiency virus vaccine, to AIDS patients in 1994 (3 of these patients have since died). The investigation into Gilada's practices began in September 1995, when a patient took Gilada to court and the Drug Controller of India testified that Gilada had not received the mandatory clearance to conduct patient trials using Manisyl. The developer of the vaccine, US-based veterinarian Bhairab Bhattacharya, also allegedly tested it on some HIV-positive prostitutes in Calcutta. The Florida-based manufacturers of the vaccine have disappeared.