Does MMR vaccine cause autism and Crohn's Disease?
Signs of autism usually develop after the child reaches 14 months. Considering that children receive their first dose of measles, mumps, rubella (MMR) vaccine at 12 months, it is understandable that parents of a seemingly normal child blame the vaccine when trying to understand why there has been a change in their son or daughter. However, several hundred million doses of the MMR vaccine have been given worldwide since its introduction and extensive data have consistently demonstrated its safety and effectiveness.