Dahl shared his experience in a leaflet published by the UK’s Sandwell Health Authority in support of the then-newly-available measles, mumps, and rubella vaccine, reports the Guardian. It reads in part (in full at io9): "One morning, when [Olivia] was well on the road to recovery, I was sitting on her bed showing her how to fashion little animals out of coloured pipe-cleaners, and when it came to her turn to make one herself, I noticed that her fingers and her mind were not working together and she couldn’t do anything. ‘Are you feeling all right?’ I asked her. ‘I feel all sleepy,’ she said. In an hour, she was unconscious. In twelve hours she was dead."He goes on to explains that in 1962, there was nothing doctors could do to save Olivia from measles encephalitis.
And more than 2 decades later that is still the case.