Effectiveness of Adolescent and Adult Tetanus, Reduced‐Dose Diphtheria, and Acellular Pertussis Vaccine against Pertussis

Abstract

This first evaluation of Tdap vaccine effectiveness in the outbreak setting suggests that Tdap provides protection against pertussis. Increased coverage is needed to realize the full benefit of the vaccine program. Serological testing was an important tool for case identification and should be considered for inclusion in the Council of State and Territorial Epidemiologists case definition.