We’ve all heard the mantras recited faithfully by government health bureaucrats, the agencies they work for, and the medical associations tied into the conventional medical system: vaccines are safe and effective, and there is no evidence that they cause adverse effects in significant numbers. Because these messages are coming from people in positions of authority, many in the public believe that such assertions are backed by credible science. Or are they? A recent study examines data on the need for doctors’ visits for unvaccinated versus vaccinated children. Read more.