Fatal and mild primary dengue virus infections imported to Norway from Africa and south-east Asia, 2008-2010 Vainio, K and Noraas, S and Holmberg, M and Fremstad, H and Wahlstrøm, M and Ånestad, G and Dudman, S, Eurosurveillance, 15, 19666 (2010), https://doi.org/10.2807/ese.15.38.19666-en