Concern exists in Europe about the possibility of importation of infectious diseases due to the recent influx of migrants and refugees after 2011. In this retrospective 6-year study, we examined the epidemiology of fever of unknown origin (FUO) in Greece over the past years. Forty-eight patients with classical FUO were included. The proportion of infectious causes of FUO (29.2%) was similar to previous studies in Greece and all infections were endemic to the area. Disease-related mortality was 12.5% and no deaths due to infection were recorded. In conclusion, none of the diagnosed infectious causes of FUO raised concerns about the possibility of imported diseases or pathogens. These results re-inforce the perception that migrants and refugees are not carriers of communicable diseases that can cause public health problems to European countries.

欧洲对由于2011年之后移民和难民的近期涌入而导致传染病进口的可能性感到担忧。在这项为期6年的回顾性研究中，我们研究了过去几年希腊的不明原因发热病的流行病学。包括48例经典FUO患者。FUO的感染原因所占比例（29.2％）与希腊先前的研究相似，并且所有感染均是该地区的地方病。与疾病相关的死亡率为12.5％，没有记录到由于感染引起的死亡。总之，没有诊断出的FUO感染原因引起人们对进口疾病或病原体可能性的担忧。这些结果强化了人们的观念，即移民和难民不是传染病的携带者，传染病会给欧洲国家造成公共卫生问题。