Prioritizing healthcare worker vaccinations on the basis of social network analysis.

Infection Control and Hospital Epidemiology : the Official Journal of the Society of Hospital Epidemiologists of America
Philip M PolgreenAlberto Maria Segre

Abstract

To use social network analysis to design more effective strategies for vaccinating healthcare workers against influenza. An agent-based simulation. A simulation based on a 700-bed hospital. We first observed human contacts (defined as approach within approximately 0.9 m) performed by 15 categories of healthcare workers (eg, floor nurses, intensive care unit nurses, staff physicians, phlebotomists, and respiratory therapists). We then constructed a series of contact graphs to represent the social network of the hospital and used these graphs to run agent-based simulations to model the spread of influenza. A targeted vaccination strategy that preferentially vaccinated more "connected" healthcare workers was compared with other vaccination strategies during simulations with various base vaccination rates, vaccine effectiveness, probability of transmission, duration of infection, and patient length of stay. We recorded 6,654 contacts by 148 workers during 606 hours of observations from January through December 2006. Unit clerks, X-ray technicians, residents and fellows, transporters, and physical and occupational therapists had the most contacts. When repeated contacts with the same individual were excluded, transporters, unit cler...Continue Reading

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