Jim Carrey and Jenny McCarthy are hoping they can use their combined star power to help raise awareness this week for the Green Our Vaccines march and rally. Jenny's son Evan was diagnosed with Autism Spectrum Disorder in 2005, and Jenny has been trying to help him and others by raising awareness of the possible link between autism and childhood vaccinations. The actors have joined with other national autism advocacy groups to press for the elimination of toxins from children's vaccines and to change children's vaccination schedules. It's always a heated debate, with facts and studies being presented on both sides, but a growing number of parents of autistic children believe that vaccines, especially those containing the mercury-based preservatives, are to blame for bringing on their children's autistic symptoms. Learn more about this weeks fund raising efforts here, and if you want to get involved in this movement now is the time!