Effectiveness and impact of the 2-component acellular pertussis vaccine as a preschool booster in Finland – A register-based study

A. Halme, Jussi; Syrjänen, Ritva; Rinta‐Kokko, Hanna; Niinimäki, Kimmo; Soininen, Anu; Abrudan, Sorin; C. Vargas-Zambrano, Juan; A. Palmu, Arto

doi:10.1371/journal.pgph.0006800

Public

Effectiveness and impact of the 2-component acellular pertussis vaccine as a preschool booster in Finland – A register-based study

Published in PLOS Global Public Health • Jul 29, 2026

Authors:

Jussi A. Halme

Ritva Syrjänen

Hanna Rinta‐Kokko

Abstract

In 2005, Finland replaced the whole-cell pertussis (wP) 3 + 1 schedule with an acellular pertussis (aP) 2 + 1 infant schedule supplemented by a DTaP-IPV preschool booster at age 4 in the National Immunization Program (NIP). Recent pertussis resurgence and uncertainty about the duration of vaccine-in...

Subject

Medicine

Booster (rocketry)

Booster dose

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