The right to choose.
D002648:Child; D002755:Choice Behavior; D006801:Humans; D032541:Mass Vaccination; D008457:Measles / Q000517:prevention & control; D022542:Measles-Mumps-Rubella Vaccine / Q000009:adverse effects; D010290:Parents; D006113:United Kingdom
D022542:Measles-Mumps-Rubella Vaccine