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A 19-year-old member asked:

can it be harmful be vaccinated twice for yhe tdap pertussis vaccine 17 year old healthy female?

2 doctor answers7 doctors weighed in
Dr. Robert Kwok
Pediatrics 33 years experience
Should be fine: If a person gets 2 tdap vaccinations in the same year (because she did not have a record of the first shot), she most likely will just get better antibody levels (more protection). Maybe the second shot can lead to more temporary soreness at the shot site in the arm, but many people have little or no soreness at all after shots.
Dr. Robert Choate
Pediatrics 44 years experience
This points out the advantage of state vaccination registries to document ALL vaccines given to individuals in ALL locations.
Feb 28, 2012
Dr. Mark Diamond
Pediatrics 46 years experience
No: Not really other some site soreness.

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Similar questions

A 47-year-old member asked:

Can it be harmful to be vaccinated twice for tdap pertussis vaccine? 17 year old healthy female.

2 doctor answers9 doctors weighed in
Dr. Marybeth Lambe
Travel Medicine 45 years experience
No: Not harmful though not much fun. Our instincts suggest your immune system may react more vigorously and give you a more tender arm but recent studies suggest that is not the case. Thus, while not needed, the upshot is getting two doses of tdap is not harmful not even more painful the second time around--just unnecessary.

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Last updated Sep 29, 2017
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