TdaP is good for 10: years. Most places in the country have a law requiring TdaP for entrance to 6th grade (age 11). As long as you had that booster, you don't need one again yet. You should have your next within the year your current one is expiring, so if you had the 11 yo one, you would be due between 20-21 years of age. Check with your doctor or your school for your vaccine record.
Answered 4/2/2020
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3 doctors weighed in across 2 answers
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