What question did this study set out to answer?

This research aims to quantify the annual incidence of influenza among healthy adults and healthcare workers.

October 18, 2011PLoS ONEOpen Access

Incidence of Influenza in Healthy Adults and Healthcare Workers: A Systematic Review and Meta-Analysis

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Systematic review finds higher influenza incidence in healthcare workers compared to healthy adults, suggesting risk factors exist.

This research aims to quantify the annual incidence of influenza among healthy adults and healthcare workers.
Systematic review of studies from OVID MEDLINE and EMBASE between 1950 and 2010.
Included observational studies and randomized trials reporting influenza infection rates for healthy adults and healthcare workers.
Analyzed data from 29 studies covering 97 influenza seasons with 58,245 participants.
Unvaccinated healthcare workers had an incidence rate of 18.7 per 100 per season, with an incidence rate ratio of 3.4 compared to healthy adults (95% CI, 1.2 to 5.7).
Vaccinated healthcare workers had an incidence rate of 6.5 per 100 per season, with an incidence rate ratio of 5.4 compared to healthy adults (95% CI, 2.8 to 8.0).
Symptomatic infections in unvaccinated healthcare workers had an incidence of 7.5 per 100, and a ratio of 1.5 versus healthy adults (95% CI, 0.4 to 2.5).

Kuster et al. (2011) studied this question.

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