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DTaP vs Tdap

post #1 of 2
Thread Starter 
What is the difference in the make up of these 2 shots? I know they are for 2 different age groups, but just curious what the difference is.
post #2 of 2
The size of the letter is the clue - DTaP has a high level of diphtheria, tetanus & pertussis antigens. Tdap has less diphteria & pertussis than DTaP.
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