Don’t mess with measles. That should be a PSA to all parents in California and America: MMR (Measles, Mumps and Rubella) is not a vaccine to skip. Health officials in Sacramento recently issued a warning after a child with infectious measles joined an educational enrichment program –– exposing up to 130 other children to the disease.  The case, part of a cluster of six children with measles in the Sacramento and Placer region, follows similar outbreaks this year in Shasta and Los Angeles