… Pertussis vaccine doses among case children were counted as valid if they were received
≥… could be slightly older than the case subjects, pertussis vaccine doses received by control …

… The apparent success of schedules that include only three doses in the first year oflife can
be explained by the failure in older children of recognition of vaccine-modified pertussis (see …

… We limited the analysis to the 2 age groups because of insignificant level of vaccine
efficacy in children 10 y old or older. SAS Institute software was used for statistical analysis. …

… In the last twenty years, despite high vaccination coverage, epidemics of pertussis are …
Pertussis can be especially difficult to diagnose in children under 1 year of age during the winter …

… of pertussis among older children was higher because they were older rather than because
of waning protection. The sharp increase in the incidence of pertussis among children 8 to …

… pertussis vaccine has contributed to the resurgence of pertussis disease, few studies have
evaluated vaccine … the 4-year-old booster dose, through to children’s eighth birthdays. …

… plus 1 dose had a lower risk of pertussis compared with fully vaccinated children (aHR = …
than twofold increased risk of pertussis among children 3 to 35 months old. In both studies, …

… are often non-specific coughs and apnoea, while for older, vaccinated children,
adolescents and adults, the symptoms can vary greatly throughout disease progression. Adult …

… from widespread use of pertussis vaccine in children was documented previously in a 1978
… As the population of individuals with vaccine-induced immunity grows older, their immunity …

… for the immunization of older children, adolescents, and adults … for only 1 booster dose in
older children, adolescents, and … , it is assumed by most pertussis vaccine and public health …