General Discussion

CDC Web states:

No recommendation for booster doses against pertussis‎
Immunity to pertussis following Tdap vaccination wanes after a few years. However, there's no recommendation to administer booster doses to maintain protection against pertussis.

Adults do need booster doses every 10 years to maintain protection against tetanus and diphtheria. Although these doses are aimed to protect against diphtheria and tetanus, healthcare providers can administer either Td or Tdap.

https://www.cdc.gov/pertussis/hcp/vaccine-recommendations/index.html#:~:text=Immunity%20to%20pertussis%20following%20Tdap,protection%20against%20tetanus%20and%20diphtheria.