Volume 16, Number 11—November 2010
Research
Outbreaks of Pandemic (H1N1) 2009 and Seasonal Influenza A (H3N2) on Cruise Ship
Figure

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.