 Montagnier and Colizzi had access to all the files of the infected subjects available at the Hospital as well as samples from European hospitals that had taken some of the sick children, as well as the samples at El-Fatih.Their report concluded that the infection at the hospital resulted from poor hygiene and reuse of syringes, and that the infections began before the arrival of the nurses and doctor in 1998.Through hospital records and the DNA sequences of the virus, they traced it to patient n.356 who was admitted 28 times between 1994–97 in Ward B, ISO and Ward A, and theorized that this patient was the probable source of the infection.