Del Matthew Bigtree is an American television and film producer as well as CEO of the anti-vaccination group Informed Consent Action Network. He produced the film Vaxxed: From Cover-Up to Catastrophe, based on the discredited opinions of Andrew Wakefield and alleges an unsubstantiated connection between vaccines and autism. Bigtree's work as a public speaker and a recent influx of funding has made Bigtree, who has no medical training, one of the most prominent voices in the anti-vaccination movement.