Outbreaks of Pandemic (H1N1) 2009 and Seasonal Influenza A (H3N2) on Cruise Ship
Kate A. Ward, Paul Armstrong, Jeremy M. McAnulty , Jenna M. Iwasenko, and Dominic E. Dwyer
Author affiliations: New South Wales Health, Sydney, New South Wales, Australia (K.A. Ward, J.M. McAnulty); Western Australian Department of Health, Perth, Western Australia, Australia (P. Armstrong); South Eastern Area Laboratory Services, Sydney (J.M. Iwasenko); Institute of Clinical Pathology and Medical Research, Sydney (D.E. Dwyer)
Figure. Date of onset of first symptoms for cruise ship passengers, by influenza subtype. Excludes 1 influenza A (H3N2) case-patient for whom onset date was unavailable and 1 pandemic (H1N1) 2009 case-patient and 2 influenza A (H3N2) case-patients who were asymptomatic but whose laboratory test results were positive.
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