Outbreak of 2009 pandemic influenza A(H1N1) in a Finnish garrison - a serological survey Aho, M and Lyytikaïnen, O and Nyholm, J E and Kuitunen, T and Rönkkö, E and Santanen, R and Ziegler, T and Nikkari, S, Eurosurveillance, 15, 19709 (2010), https://doi.org/10.2807/ese.15.45.19709-en