this post was submitted on 15 Jul 2024
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The Simpsons

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[–] [email protected] 13 points 3 months ago

It looks like the widely available/popular MMR vaccine was widespread by the late 70s, and given Lisa's age she would have been born in the early 80s.

So she likely would have gotten it.

However I suspect the writers for the show just reflected on their own childhood when people getting mumps was a thing.