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Vaccine guidance from Mayo Clinic

Tetanus, diphtheria, pertussis (Tdap) vaccine

Tetanus is a serious disease that causes muscle contractions, particularly in the jaw and neck muscles. The bacteria that cause tetanus enter the body through cuts or wounds. Severe complications of tetanus infection can be life-threatening.

Diphtheria is a serious infection that usually affects the mucous membranes of the nose and throat. In advanced stages, diphtheria can damage the heart, kidneys and nervous system. Even with treatment, the disease can be deadly, especially in children. Diphtheria is rare in the U.S., thanks to widespread vaccination. But many countries still have high rates of diphtheria.

Whooping cough (pertussis) is a highly contagious respiratory tract infection. It often causes a severe hacking cough followed by a high-pitched intake of breath that sounds like "whoop." The infection can be deadly in infants.

One dose of Tdap vaccine is recommended during each pregnancy, regardless of when you had your last Tdap or tetanus-diphtheria (Td) vaccination. Receiving the Tdap vaccine during pregnancy helps protect your newborn from whooping cough (pertussis). Ideally, the vaccine should be given between 27 and 36 weeks of pregnancy. Getting the Tdap vaccine during pregnancy can protect you from infection and can also help protect your newborn before vaccination is possible.