David talks to Peter Duesberg about his heretical views on AIDS and cancer. Way back in 1987 he wrote a paper giving the reasons why all retroviruses, not just HIV, could not cause disease in animals. And despite being the discover of the first oncogene, cancer gene, he changed his opinion and now believes that it is not mutations, but the wrong number of chromosomes, aneuploidy, that triggers cancer. Duesberg refers to a 2013 paper on the karyotypes, chromosome counts, of cervical cancer cells, which can be found here: http://molecularcytogenetics.biomedcentral.com/articles/10.1186/1755-8166-6-44