High frequency of cross-reacting antibodies against 2009 pandemic influenza A(H1N1) virus among the elderly in Finland
Ikonen, N and Strengell, M and Kinnunen, L and Österlund, P and Pirhonen, J and Broman, M and Davidkin, I and Ziegler, T and Julkunen, I, Eurosurveillance, 15, 19478 (2010), https://doi.org/10.2807/ese.15.05.19478-en