 More human trials were conducted in Tanzania in 2000 even after the South African Medicines Control Council ruled that such trials would be unethical and in contravention of the law and refused permission for human trials in 1998.The Tanzania health agency, NIMR, also rejected proposals for human trials, but the Vissers approached the Tanzanian Defence Force directly and conducted the trials in military hospitals.Calls were made for an investigation of South African President Thabo Mbeki's involvement in support or funding of the company.