 [ Symptoms ] as an adult i received the dtp vaccine in 1996 would i still need the tdap  i did not have my immunization records when i went back to college in 1996 at age 22 so i received the dtp and mmr again at that time would i still need to get the tdap booster or am i still protected by the dtp [ Disease ] adults should get a booster shot for tetanus and diphtheria every 10 years and since immunity to pertussis also wears off you need a pertussis booster one time so yes even though you have had the vaccinations before since the last one was over 10 years ago you do need a tdap to get immunized against tetanus diphtheria and pertussis then every 10 years after that you will just need the tetanus and diphtheria