Le TV, Nguyen VTT, Nguyen QH, Tran HLT, Tran SD, Vien CC (2025) The evaluation of anti-diphtheria toxoid antibodies after 5 years with the primary Tetanus-Diphtheria vaccine in persons aged 6-25 years in Kon Tum, Vietnam: a follow-up study. J Infect Dev Ctries 19:22–27. doi: 10.3855/jidc.19390