A heartbreaking letter from Roald Dahl makes the case for vaccinations

Roald Dahl had a pretty good reason to encourage parents to vaccinate their children: His daughter, Olivia, died from measles in 1962, before there was a measles vaccine. In 1988, Dahl wrote a heartfelt letter describing the helplessness he felt after Olivia's death and encouraging parents to vaccinate their own children: On the other hand, there is today something that parents can do to make sure that this sort of tragedy does not happen to a child of theirs. They can insist that their child is...