A recent report from the Centers for Disease Control and Prevention (CDC) found polymerase chain reaction (PCR) tests that simultaneously test for multiple causes of a rash may show false positives for measles in children who recently had a dose of the measles, mumps, rubella (MMR) vaccine. About approximately 5% of kids experience a rash 7–10 days after the MMR shot. A study of 1,548 syndromic PCR panels from the Tennessee Department of Health found 14 children …
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