• MMR (Measles, Mumps, and Rubella)
  • Storage & Handling

A box of MMR vaccine (not reconstituted) was left at room temperature overnight. Can I use it?

Unfortunately, serious errors in vaccine storage and handling like this occur too often. If you suspect that vaccine has been mishandled, you should store the vaccine as recommended, then contact the manufacturer or state/local health department for guidance on its use. This is particularly important for live virus vaccines like MMR and varicella.

Last reviewed: June 19, 2023

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