Hearing loss has been reported following receipt of the Measles-Mumps-Rubella (MMR) vaccine.

Pathogenesis: The MMR vaccine contains live attenuated virus. It is hypothesized that one of the viruses causes the hearing loss.


Estimated frequency: 1 case per 6-8 million doses


Clinical features:

(1) receipt of the MMR vaccine containing live attenuated viruses

(2) onset of unilateral or bilateral hearing loss 1-4 weeks after the vaccination

(3) exclusion of other causes of hearing loss

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