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Epidemic curve of confirmed influenza cases and cases of medically attended acute respiratory illness (MAARI) among passengers and crew on Ship B, March 20 to April 5, 2014. Medically attended acute respiratory illness includes cases of influenza-like illness and acute respiratory illness, Day 0 corresponds to March 20, 2014, which was the day of departure for Ship A, C corresponds to a confirmed case of influenza in a crew member.
