ECDC has published Epidemiological update: Legionella in Dubai. Excerpt:
Increase in travel-associated Legionnaires’ disease among European travellers returning from Dubai since 1 October 2016.
The ECDC surveillance scheme (ELDSNet) for travel-associated Legionnaires’ disease (TALD)  has observed an increase in the number of cases associated with travel to Dubai, United Arab Emirates (UAE) since the beginning of the last quarter of 2016 compared with the two previous years (Figure 1).
The doubling of cases observed in October and November 2016 (compared with 2014 and 2015) led to an ECDC rapid risk assessment published on 23 December 2016. As cases continued to be reported in December and January, an ECDC epi update was published on 17 January 2017. This second epi update shows a larger number of cases reported in February 2017 than in February 2014 or 2015.
As of 6 March 2017, 44 TALD cases with a history of travel to Dubai within 2–10 days prior to illness and with onset since 1 October 2016, have been reported to ECDC by EU Member States and one European Free Trade Association (EFTA) country. Forty cases associated with commercial accommodation sites were reported through the ELDSNet TALD surveillance scheme and four cases associated with private accommodation sites in Dubai were reported by the United Kingdom (UK). Cases were reported by the United Kingdom (20 cases), Sweden (6), the Netherlands (5), France (3), Denmark (3), Germany (3), Austria (1), Belgium (1), Hungary (1) and Switzerland (1).
The delay between week of illness onset and week of reporting cases to ELDSNet is around two weeks, ranging from one to six weeks. Therefore, the number of cases reported in the past six weeks is likely to be underestimated.