The majority were infected with the virus between 1986 and 1991 due to government policies allowing the use of contaminated needles and "microtransfusions" in which small children were injected with untested blood in the mistaken belief that this would boost their immune systems.
Većina njih zaražena je virusom u periodu između 1986. i 1991. godine, zbog vladine politike koja je omogućavala korišćenje zaraženih igala i «mikrotransfuzija» prilikom kojih su maloj deci davane injekcije sa netestiranom krvi, u zabludi da će to pojačati njihov imuni sistem.