If you mean measles, mumps, rubella (german measles) and chickenpox, yes, there was called the MMRV. It is currently not in use. The MMR has been in use since the early 1970's. If the MRC means something else, then I have not hear of a vaccine by those initials. In our special edition this month on the home page for immunizations, read and see if that answers your question.
Wayne Yankus, MD, FAAP
expert panelist: pediatrics