I have heard many things about getting the tdap when pregnant. where is the scientific evidence that it is safe during pregnancy?

ACIP: - The Advisory Committee on Immunization Practices (ACIP) is a group of medical and public health experts that develop recommendations on use of vaccines in the civilian population of the United States... More(http://www.cdc.gov/vaccines/acip/about.html)

Studied/benefit: We have known for decades that vaccines with dead or synthetic components are safe in pregnancy .Everything in the TdaP is non-living. We advise women to avoid living vaccines like nasal flu/MMR to be safe, not because we have firm evidence of harm. The alternative is having a baby is not able to build their own immunity to whooping cough until older, but mothers can pass enough to avoid death