We will recommend the TDap (tetanus, diphtheria, pertussis) between 27 and 36 weeks of pregnancy. This is a safe way to protect your baby from serious illness associated with pertussis (also known as whooping cough) after delivery. When you get the vaccine, your body will make antibodies that get passed to your baby to help protect him or her. The influenza vaccine (flu shot) is also recommended during flu season. This is safe in pregnancy and encouraged.