Adolescents and adults are significant sources of transmission of B. pertussis to unvaccinated young infants. The highest rates of pertussis-associated complications are reported in the young infant (<2 months) age group. By vaccinating a pregnant woman with a Tdap vaccine, her baby will get pertussis antibodies that may help to minimise the morbidity and mortality associated with pertussis in neonates before their primary DTaP vaccine series can be safely completed.

 

There are two main types of pertussis vaccine: whole-cell vaccines and acellular vaccines. The whole-cell vaccine is about 78% effective while the acellular vaccine is 71 to 85% effective.

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