ET takes you to Wahsington, DC, where JIM CARREY and JENNY McCARTHY lead a march and rally aimed at drawing attention to the issue of toxins in children's vaccines.
McCarthy, who wrote the best-selling book Louder Than Words: A Mother's Journey in Healing Autism, has become a national advocate for groups trying to eradicate toxins from vaccines. The actress and author has an autistic son.
McCarthy, along with many other parents of autistic children, believes there is a link between the illness and vaccines that contain toxins, even though the mainstream medical community has not drawn this conclusion.