evidence: - MMR (Measles, Mumps, and Rubella) What is the current situation with measles, mumps, and rubella in the United States? In 2022, a provisional total of 121 cases of measles from 6 states were reported to CDC. The sharply limited global travel and social interactions precipitated by the COVID-19 pandemic, which began in early 2020, also reduced the opportunities for introduction and transmission of measles, mumps, and rubella viruses in the United States. Current CDC measles surveillance updates can be found at www.cdc.gov/measles/data-research/.