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Hong Kong: The European Centre for Disease Prevention and Control (ECDC) reports there have been 489 influenza-associated admissions to intensive care units, including 348 deaths between 5 May and 10 August 2017. 438 of these cases were influenza A(H3N2). This year, there have been 27 cases of severe influenza (including 4 deaths) in children.
Travellers to countries during their influenza season are at similar risk of infection as local residents.
Crowded conditions encourage spread of infection and travellers can be exposed, for example in those attending pilgrimages (e.g. the Hajj), in aircraft, waiting rooms, buses, bars, hotels and on cruises.
Travellers included in the government's at risk groups should ensure that they receive the annual influenza vaccine, particularly if travel is anticipated. Travellers outwith these groups may wish to obtain the vaccine privately (if still available) if concerned.
For further information see Influenza.