 Luc Montagnier and Vittorio Colizzito were called to testify in person on behalf of the medics.Professor Montagnier, the co-discoverer of the Human Immuno-deficiency Virus (HIV), testified that the virus in the 393 children studied is a rare type found mostly in West Africa, but also throughout the continent.Montagnier told the court that the outbreak was probably started by an infected child admitted for treatment at the hospital.