Amy L Greer1, David N Fisman. 1. Child Health Evaluative Sciences, Research Institute of the Hospital for Sick Children, Toronto, Ontario, Canada. amy.greer@sickkids.ca
Abstract
OBJECTIVE: To examine the impact of different acellular pertussis booster vaccination strategies on the probability of a nosocomial pertussis outbreak occurring and the distribution of outbreak sizes observed for each intervention strategy. SETTING: Neonatal intensive care unit. METHODS: We developed a stochastic, agent-based simulation model to examine the impact of booster vaccination strategies for pertussis on health care-related transmission. RESULTS: Our results demonstrate that healthcare worker booster vaccination decreases the probability of secondary transmission from 49% (base case, no boosting) to 2% (if 95% of healthcare workers are boosted) and decreases final outbreak size. Boosting family caregivers did not have a clinically significant impact on nosocomial disease transmission. CONCLUSION: The provision of booster vaccine to healthcare workers in the neonatal intensive care unit substantially reduces the risk of hospital-centered pertussis outbreaks in a manner that enhances the health of hospitalized children. A formal health economic analysis of this finding is currently under way. Policies to protect patient safety in pediatric facilities should include compliance with the United States Advisory Committee on Immunization Practices, which recommends provision of pertussis booster vaccination to healthcare workers.
OBJECTIVE: To examine the impact of different acellular pertussis booster vaccination strategies on the probability of a nosocomial pertussis outbreak occurring and the distribution of outbreak sizes observed for each intervention strategy. SETTING: Neonatal intensive care unit. METHODS: We developed a stochastic, agent-based simulation model to examine the impact of booster vaccination strategies for pertussis on health care-related transmission. RESULTS: Our results demonstrate that healthcare worker booster vaccination decreases the probability of secondary transmission from 49% (base case, no boosting) to 2% (if 95% of healthcare workers are boosted) and decreases final outbreak size. Boosting family caregivers did not have a clinically significant impact on nosocomial disease transmission. CONCLUSION: The provision of booster vaccine to healthcare workers in the neonatal intensive care unit substantially reduces the risk of hospital-centered pertussis outbreaks in a manner that enhances the health of hospitalized children. A formal health economic analysis of this finding is currently under way. Policies to protect patient safety in pediatric facilities should include compliance with the United States Advisory Committee on Immunization Practices, which recommends provision of pertussis booster vaccination to healthcare workers.