his eldest daughter died from measles
... that Roald Dahl became an advocate of vaccination after his eldest daughter died from measles, saying that it was "almost a crime to allow your child to go unimmunized"?
... that <a href="./Roald_Dahl" id="mwBns" rel="mw:WikiLink" title="Roald Dahl">Roald Dahl</a> became an advocate of vaccination after <b id="mwBnw"><a class="mw-redirect" href="./Death_of_Olivia_Dahl" id="mwBn0" rel="mw:WikiLink" title="Death of Olivia Dahl">his eldest daughter died from measles</a></b>, saying that it was "almost a crime to allow your child to go unimmunized"?