 In 2002 he extended his experimentation into viral artificial life through a collaboration with the programmer Stephane Sikora of music2eye in a work called the "Computer Virus Project II", inspired by the a-life work of John Horton Conway (particularly Conway's Game of Life), by the general cellular automata work of John von Neumann, by the genetic programming algorithms of John Koza and the auto-destructive art of Gustav Metzger.In 2005 he exhibited "Computer Virus Project II" works (digital paintings, digital prints, a digital audio installation and two "live" electronic virus-attack art installations) in a solo show called "cOntaminatiOns" at Château de Linardié in Senouillac, France.In 2006 Nechvatal received a retrospective exhibition entitled "Contaminations" at the Butler Institute of American Art's Beecher Center for Arts and Technology.