Background: A resurgence of pertussis cases among both vaccinated and unvaccinated
people raises questions about vaccine effectiveness over time. Our objective was to study …

Background. Unexpected waning of immunity after pertussis vaccination is now well
described. In this study we examined whether prior vaccination with whole-cell pertussis …

OBJECTIVES: To determine pertussis risk by diphtheria-tetanus-acellular pertussis (DTaP)
vaccination status and time since last DTaP dose. METHODS: Children born at Kaiser …

Background Acellular pertussis vaccine studies postulate that waning protection, particularly
after the adolescent booster, is a major contributor to the increasing US pertussis incidence …

Importance An alternative option to maternal vaccination to prevent severe pertussis in
infants is vaccination at birth. Data are needed on the immunogenicity and safety of a birth …

Background. Acellular pertussis (aP) and whole-cell (wP) pertussis vaccines are presumed
to have similar short-term (< 3 years after completion of the primary series) efficacy …

OBJECTIVES Following the introduction of jurisdictional maternal pertussis vaccination
programs in Australia, we estimated maternal vaccine effectiveness (VE) and whether …

Pertussis has had a resurgence with the highest incidence and complication rates in young
infants, and deaths occurring mainly at< age 3 months. Infants are infected by older …

Background. The incidence of reported pertussis among adolescents, adults, and young
infants has increased sharply over the past decade. Combined acellular pertussis vaccines …

Infants are vulnerable to pertussis infection particularly before initiation of pertussis
vaccination. Maternal pertussis vaccination during pregnancy has been introduced in a …