Is Mutating Mumps More Than the MMR Can Manage? By Vincent Iannelli, MD / June 24, 2018 / attack rate, genotype, genotype G, Jeryl Lynn, MMR vaccine, mumps, mumps outbreaks, parotitis, strain, third dose of MMR, Vaccine Misinformation, vaccine strains, waning immunity, wild strains Does the MMR vaccine still work against mumps or has the virus mutated? Share this:FacebookTwitterRedditPrintLinkedInPinterestEmailTumblrWhatsAppLike this:Like Loading...