There's just one small problem with this plan: no scientist has ever produced a purified sample of HIV. As the Star notes, "a virologist who does not want to be named is of the view that a purified form of HIV would be difficult to produce, the key issue being that a virus normally exists in some sort of medium which would automatically mean it was not pure. HIV has not yet been isolated, so it is unlikely that the challenge, under the exact conditions stipulated by Rasnick, could ever happen."