evidence: I think they mean that we haven’t done the best study. Those of us in the scientific and medical fields frequently demand well-designed studies — like double-blinded, randomized, placebo-controlled trials — so why not apply that same requirement to vaccines? Why hasn’t anybody ever done that study? [...] The placebo group shouldn’t have any side effects — nothing significant, anyway. Sure, some of these kids will have autism, allergic reactions, or other problems — because, well, these things happen — but we’ll know it isn’t because of the vaccines. We would compare the rates of these side effects to those in the vaccine group. If the rates of, say autism, are the same in the vaccine group as the placebo group, we could conclude that vaccines don’t cause autism. [...] Hopefully, you’ve realized (if you didn’t already) why we haven’t done this study — and why we never will. Vaccines prevent disease — in your child, your child’s friends, and people who can’t be vaccinated. Vaccines save lives. No, we don’t have a double-blinded, randomized controlled trial comparing our vaccine schedule to placebo. But we do have some pretty convincing evidence. Check it out for yourself.