When should adults receive a one-time dose of Tdap?

Adults should receive a one-time dose of Tdap (Tetanus, Diphtheria, and Pertussis) if they did not receive it during their childhood vaccination series. This recommendation is based on the fact that the childhood series typically includes DTaP (the pediatric formulation), and it is important for adults to have immunity against pertussis, which can be a significant public health concern.

Vaccination in adulthood helps to bolster immunity, especially because pertussis can be particularly severe in infants who have not yet been fully vaccinated. Therefore, administering Tdap to adults who missed this vaccine in childhood not only protects them but also helps protect vulnerable populations within the community through herd immunity.

Receiving Tdap during specific life stages and situations, such as during pregnancy or before exposure to infants, further emphasizes the importance of this vaccination. Adults should also continue to receive Td (Tetanus and Diphtheria) boosters every ten years, but the one-time Tdap dose is crucial for those who did not receive it in childhood.