References https://www.who.int/news-room/fact-sheets/detail/rubella https://www.cdc.gov/rubella/about/in-the-us.html https://en.wikipedia.org/wiki/Measles https://www.cdc.gov/vaccines/pubs/pinkbook/meas.html https://www.ecdc.europa.eu/en/mumps/facts https://www.bitchute.com/video/K7upxskYEU0e/ https://www.cdc.gov/mumps/hcp.html