CDC guidance on contraindications and precautions for MMR vaccination, relevant to protecting medically fragile peers.
“Some people should not get MMR vaccine, including those with severe immunodeficiency or certain medical conditions.”
Primary source: https://www.cdc.gov/vaccines/vpd/mmr/public/index.html
Page prepared October 21, 2025. If this link changes, search the publisher site for the most recent version.