I love Penn & Teller. In their great anti-woo Showtime series "Bullshit!" they take on the antivaxers. Here's a clip.
Scientific study after scientific study has shown conclusively that vaccines do not cause autism. It's also a fact that the diseases we vaccinate children against used to kill children who contracted them every year (or leave them with lifelong disabilities). Read about polio sometime. Unfortunately, many people would rather learn "science" from bobbleheads like Jenny McCarthy (view the Jenny McCarthy body count).