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" ... “We studied 77 unvaccinated children before and 2 months after natural measles virus infection,” writes the authors of the paper. “Measles caused elimination of 11 to 73% of the antibody repertoire across individuals. Recovery of antibodies was detected after natural reexposure to pathogens. Notably, these immune system effects were not observed in infants vaccinated against MMR (measles, mumps, and rubella), but were confirmed in measles-infected macaques.” ... "