Attenuated virus vaccine during pregnancy

An Attenuated virus vaccine is a vaccine which contains viable or live viruses but virulence of those viruses are diminished. Commonly used Attenuated virus vaccines are the vaccines against measles, mumps, poliomyelitis, rubella, yellow fever, and varicella. These attenuated virus vaccines are contraindicated during pregnancy. Because the attenuated vaccines containing viruses can cause the relevant disease, particularly in immunocompromised patients. But no cases of fetal damaged were reported yet. MMR vaccine is safe during lactation.