Share on Pinterest The CDC reports that 96% of measles cases in the U.S. are in people who are unvaccinated or whose vaccination status is unknown. FG Trade/Getty Images The growing measles ...

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Subacute sclerosing panencephalitis (SSPE) typically results from persistent measles virus infection at a young age. Myoclonus is the most common and frequently the first symptom.28 Rare and less ...