I am two months pregnant . Measles, mumps, and rubella vaccine viruses are not transmitted from the vaccinated person, so MMR does not pose a risk to a pregnant household member. I am breast feeding my 2 month old baby . Breast feeding does not interfere with the response to MMR vaccine. Disease exposure, including chickenpox, should not delay anyone from receiving the benefits of the MMR or any other vaccine.
Most people have no reaction.