He is author of an hypothesis published in Lancet in 1991 (Simian Retroviruses polio vaccine and the Origin of AIDS, [The Lancet (339:600-601, 7 Mar. 1992)] providing evidence for a link between the onset of the AIDS epidemic with therapeutic use of live oral polio vaccine contaminated with Simian Immunoodeficiency Virus (SIV) to treat genital herpes. An expert in adventitious agent contamination of vaccines as well as oral polio vaccine neurovirulence, Mr. Kyle has helped secure federal compensation for more than 40 plaintiff’s in the U.S. Court of Claims under the National Childhood Vaccine Injury Act of 1986.