Seroprevalence of Antibodies against Diphtheria, Tetanus and Pertussis in Adult At-Risk Patients., Boey, Lise, Bosmans Eline, Braz Ferreira Liane, Heyvaert Nathalie, Nelen Melissa, Smans Lisa, Tuerlinckx Hanne, and Vandermeulen Corinne , Vaccines (Basel), 2021 Jan 04, Volume 9, Issue 1, (2021)