Example based on: Inns, T. et al. Outbreak of Salmonella enterica Goldcoast
infection associated with whelk consumption, England, June to October 2013. Euro
Surveill. Bull. Eur. Sur Mal. Transm. Eur. Commun. Dis. Bull. 18, (2013)
, Case-control example
During September 2013, 17 cases of Salmonella Goldcoast
were reported
England saw an average of 9 cases per year over the last
three years
Is this unusual?
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