The vaccine consisted of inactivated SIV administered alongside doses of familiar bacteria the TB-suppressant bacterium BCG, and subsequently with gut bacteria of the Lactobacillus genus, including one type commonly used in probiotic supplements. A vaccination program is cooperation between scientists at the French Institute for research on Cancer and HIV Vaccines at Paris-Descartes University and scientists at the Chinese Tropical Medicine Institute at the University of Chinese Medicine in Guangzhou.