Lucy,
“If one looks at the package insert for live vaccines such as MMR, there are warnings given that you can shed the virus onto others.”
From Merck.
“There are no reports of transmission of live attenuated measles or mumps viruses from vaccinees to
susceptible contacts.”
From CDC website:
“Some vaccinees intermittently shed small amounts of virus from the pharynx 7-28 days after vaccination. However, studies of greater than 1,200 susceptible household contacts and experience gained over 20 years of vaccine use failed to identify transmission of vaccine virus. These findings indicate that vaccinating susceptible children whose mothers or other household contacts are pregnant does not present a risk. Rather, vaccination of such children provides protection for these pregnant women. ”
No whitewashing here.