Helena H. Askling
1
, Birgitta Lesko
1, Sirkka Vene, Angerd Berndtson, Per Björkman, Jonas Bläckberg, Ulf Bronner, Per Follin, Urban Hellgren, Maria Palmerus, Karl Ekdahl, Anders Tegnell, and Johan Struwe
Author affiliations: Karolinska Institute, Stockholm, Sweden (H.H. Askling, K. Ekdahl); Karolinska University Hospital, Stockholm (H.H. Askling, U. Bronner, U. Hellgren); Swedish National Board of Health and Welfare, Stockholm (B. Lesko, A. Tegnell); Swedish Institute for Infectious Disease Control, Stockholm (B. Lesko, S. Vene, A. Berndtson, J. Struwe); Malmö University Hospital, Malmö, Sweden (P. Björkman); Lund University Hospital, Lund, Sweden (J. Bläckberg); Linköping University Hospital, Linköping, Sweden (P. Follin); County Hospital Ryhov, Jönköping, Sweden (M. Palmerus); European Centre for Disease Prevention and Control, Stockholm (K. Ekdahl)
Main Article
Figure

Figure. Flow chart of serologic methods performed blindly on all paired serum samples (n = 383), Sweden. Ig, immunoglobulin; MAT, microscopic agglutination test; IF, immunofluorescent.
Main Article
Top of Page