[Increased travelling--increased risk of imported viruses. A review of the diagnostic capacity of the Swedish Institute for Infectious Disease Control].

The increase in global travel, especially by air, has facilitated the spread of infectious agents from one part of the world to another. Returning travellers are often vectors for viral disease import to Sweden. While dengue fever has been quite frequently diagnosed during the past five years, especially in travellers returning from Thailand, only isolated cases of sandfly fever, Japanese encephalitis and Ross River fever have been seen. Dobrava virus was recently shown to have caused a severe form of haemorrhagic fever with renal syndrome in several European countries, and thus constitutes a risk for travellers to areas where it is endemic.