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[–]wizzwizz4 1 insightful - 1 fun1 insightful - 0 fun2 insightful - 1 fun -  (0 children)

TL;DW: Vaccine introduction occurred after measles had dropped off significantly in the UK and the US. However, the "vaccine reduces immune system" effect hasn't been shown to hold; it's equally-well explained by those with a weaker immune system dying of measles, i.e. selection bias.