Waning immunity to pertussis following 5 doses of DTaP

SY Tartof, M Lewis, C Kenyon, K White, A Osborn… - …, 2013 - publications.aap.org
OBJECTIVE: To assess the risk of pertussis by time since vaccination in children in
Minnesota and Oregon who received 5 doses of acellular pertussis vaccines (DTaP).
METHODS: These cohort analyses included Minnesota and Oregon children born between
1998 and 2003 who had 5 DTaP doses recorded in state Immunization Information Systems.
Immunization records and statewide pertussis surveillance data were combined. Incidence
rates and risk ratios for pertussis were calculated for the 6 years after receipt of the fifth DTaP …