What is the cause of a rash after measles-mumps-rubella vaccination?

“We describe a 17-month-old child with fever and rash after measles-mumps-rubella vaccination. Detection of vaccine-strainmeasles virus in his urine by polymerase chain reaction confirmed the diagnosis of a vaccine reaction rather than wild-type measles. We propose that measles virus should be sought and identified as vaccine or wild-type virus when the relationship between vaccination and measles-like illness is uncertain.”

The Medical Journal of Australia 1999

Transmission of measles among a highly vaccinated school population–Anchorage, Alaska, 1998.

“During August 10-November 23, 1998, 33 confirmed measles cases were reported to the Anchorage Department of Health and Human Services and the Alaska Department of Health and Social Services (ADHSS). Of these, 26 cases were confirmed by positive rubeola IgM antibody test, and seven met the clinical case definition. This was the largest outbreak of measles in the United States since 1996. This report summarizes results of the epidemiologic investigation conducted by ADHSS and underscores the importance of second-dose requirements for measles vaccine.” 

CDC 1999

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