BACKGROUND Dengue fever is the most common arboviral disease in travelers. In countries where dengue virus is endemic, sequential (secondary) infections with different dengue virus serotypes are associated with disease severity. Data on severity and secondary infection rates in a population of travelers are lacking. METHODS Intensified surveillance of… (More)
The first reported case of tickborne encephalitis (TBE) in Norway occurred in 1997. From 1997 to 2003, from zero to two cases of human TBE have been diagnosed per year in Norway, for a total of eight cases. Clinical TBE cases in dogs are not reported in Norway.