how often should you get whooping cough vaccine
1 Vaccination of pregnant women with Tdap is especially important to help protect infants. 2  Pregnant women should get the vaccine late in the second trimester or in the third trimester for each pregancy. 3  All adults age 19 to 64 years need a one-time whooping cough booster vaccine. Adults age 65 years and older need a one-time whooping cough booster if they will have close contact with infants younger than 12 months. 2  If not already vaccinated, pregnant women should receive the booster vaccine late in the second trimester or during the third trimester, during each pregnancy.