A vaccine contains a weakened or killed form of a disease-causing micro-organism that causes your body to produce antibodies. This provides immunity without actually inducing the disease. Vaccines are a very controversial topic. This episode introduces what vaccines are and gets into specifics on the Tdap vaccine during pregnancy. In addition to different types of vaccines, they contain many ingredients. These ingredients serve a particular function like increasing your immune response or as a byproduct of the processing. Tdap provides immunity for tetanus, diphtheria, and pertussis (whooping cough) and is recommended during pregnancy. Get the evidence-based risks and benefits of getting the Tdap vaccine during pregnancy so you can make an informed decision on whether it is right for you.