Nonfebrile seizures after mumps, measles, rubella, and varicella-zoster virus combination vaccination with detection of measles virus RNA in serum, throat, and urine.

We report the case of a child presenting with nonfebrile seizures 6 and 13 days after the first vaccination with a measles, mumps, rubella, and varicella (MMRV) combination vaccine. Measles virus RNA was detected in the patient's serum, throat, and urine. Genotyping revealed the Schwarz vaccine virus strain.