One 2008 study indicated a rate of febrile seizures of 9 per 10,000 vaccinations with MMRV, as opposed to 4 per 10,000 for separate MMR and varicella shots; U.S. health officials known as the ACIP therefore do not express a preference for use of MMRV vaccine over separate injections.
A 2008 study found that febrile seizures occurred at a rate of 9 per 10,000 vaccinations with MMRV and 4 per 10,000 for separate MMR and varicella shots; U.S. health officials known as the ACIP do not express a preference between these vaccines.