Adults who want to reduce their likelihood of becoming ill with pertussis may consider receiving a pertussis-containing vaccine

Vaccination with dTpa may be considered for any adult who wants to reduce their likelihood of becoming ill with pertussis. 

If protection against pertussis is needed as soon as possible, adults can receive 1 dose of dTpa vaccine at least 4 weeks after a dose of dT (diphtheria-tetanus) vaccine. Studies indicate that short intervals between doses are not associated with increased injection site reactions.^10-13

See Catch-up vaccination for more details.