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Estimating the number of pertussis-susceptible children aged 0-23 months in the United States. Using the National Immunization Survey (NIS) 2013

Childs, Lana (2016)
Master's Thesis (36 pages)
Committee Chair / Thesis Adviser: Bednarczyk, Robert A
Committee Members:
Research Fields: Public health; Epidemiology
Partnering Agencies: Emory University schools, faculty or affiliated programs ; CDC
Keywords: disease susceptibility; immunization; pertussis; DTaP vaccine
Program: Rollins School of Public Health, Epidemiology (Global Epidemiology)
Permanent url: http://pid.emory.edu/ark:/25593/rjxc5

Abstract

Despite high coverage with pertussis-containing vaccines in the United States (US), children who are unvaccinated or not fully vaccinated remain susceptible to pertussis. Over multiple birth cohorts, the number of children who are not immune to pertussis will accumulate due to factors such as the child's age and age-specific vaccination status and vaccine dose-specific vaccine effectiveness. The total number of pertussis-susceptible children aged 0-23 months in the US is unknown. By using age-specific data on receipt of pertussis-containing vaccine by children evaluated in the 2013 National Immunization Survey, and accounting for vaccine effectiveness, maternal transfer of anti-pertussis antibodies, and vaccination disparities by poverty status, we estimated the number of pertussis-susceptible children aged 0-23 months. Of 7,905,672 children aged 0-23 months in the US, we estimate that approximately 22% (1,726,113) are susceptible to pertussis. Children aged 0-23 months living below poverty are more susceptible to pertussis than children living at or above poverty (below 23% susceptible compared to 20% for at or above). In sensitivity analysis, a sustained decrease to 95% of current vaccination levels would increase the proportion of children susceptible to pertussis to 26%. Age was a large factor in susceptibility with 76% of children aged 0-2 months not immune to pertussis compared to 7% of children aged 21-23 months. These estimates underscore the need to monitor age-specific pertussis vaccine coverage and to increase childhood pertussis vaccine coverage, to maintain population level immunity and to prevent the spread of pertussis among young children.

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application/pdf Estimating the number of pertussis-susceptible children aged 0-23 months in the United States. Using the National Immunization Survey (NIS) 2013 36 pages (496.8 KB) [Estimating the number of pertussis-susceptible children aged 0-23 months in the United States. Using the National Immunization Survey (NIS) 2013 ]
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