According to Singapore’s Ministry of Health, approximately five cases of pertussis are being reported weekly. Since mid-September 2024, more than 30 cases—a six-fold increase over the average incidence—have been documented. Notably, the outbreak has not yet reached its peak.

To safeguard against pertussis, all adult travelers are advised to receive one dose of Tdap (the adult acellular pertussis-containing vaccine) every ten years, provided they have completed an adequate primary vaccination series. Additionally, individuals aged over 65, or those with immunocompromising conditions or underlying lung disease, should consider a booster dose if at least three years have passed since their last acellular pertussis-containing vaccine. This recommendation is off-label but aims to enhance protection during the outbreak.

For those whose most recent tetanus vaccine was Td or TT, immediate administration of Tdap is recommended, irrespective of the interval since their last tetanus dose. This measure helps ensure comprehensive protection against pertussis in light of the current situation.

Parents of infants who have not yet completed a three-dose series of a pertussis-containing vaccine should carefully evaluate travel plans. Postponing travel until the infant has received their third dose may significantly reduce the risk of exposure to the disease.