Is the Tdap vaccine safe?

The Tdap vaccine has been studied very carefully and is safe. The CDC and FDA continue to monitor the safety of vaccines including the Tdap vaccination. The CDC uses 3 systems to monitor the safety of vaccines including the Vaccine Adverse Event Reporting System (VAERS), Vaccines Safety Datalink (VSD), and the Clinical Immunization Safety Assessment Project (CISA). The vaccine can cause mild side effects like redness and soreness in the arm where the shot was given.