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Medical Biology|December 1, 1982
Seroepidemiology of H1N1 influenza: the range of the affected population is wideningR Pyhälä, K AhoMedical Biology|January 1, 1986
Intraepidemic heterogeneity of influenza A (H3N2) viruses in 1985: antigenic analysis and sensitivity to non-specific inhibitorsR Pyhälä, L Pyhälä, R VisakorpiScandinavian Journal of Immunology|January 1, 1976
IgA deficiency and influenza infectionK Aho, R Pyhälä, J KoistinenJournal of Neurology, Neurosurgery, and Psychiatry|February 1, 1981
Post-influenzal encephalitis during the influenza A outbreak in 1979/1980R Sulkava, A Rissanen, R PyhäläScandinavian Journal of Infectious Diseases|January 1, 1979
Risk of infection among seafarers: a prospective seroepidemiological survey of the crew of a passenger cruiserK Aho, R Pyhälä, O EloThe Journal of Hygiene|June 1, 1985
The HI test modified by ether treatment in the sero-epidemiological surveillance of influenza BR Pyhälä, M Kleemola, R VisakorpiTissue Antigens|October 1, 1980
ABO associated genetic determinant in H1N1 influenzaK Aho, R Pyhälä, R VisakorpiActa Pathologica Et Microbiologica Scandinavica. Section B, Microbiology|June 1, 1979
Seroepidemiology of H1N1 influenza: striking differences in the attack rate among young peopleR Pyhälä, K Aho, R VisakorpiEpidemiology and Infection|June 1, 1988
Host cell-mediated selection of influenza A (H3N2) virus variant subpopulations: lack of association between antigenic and receptor-binding propertiesR Pyhälä, L Pyhälä, P PekkalaJournal of Virological Methods|January 1, 1985
Enzyme immunoassay, complement fixation and hemagglutination inhibition tests in the diagnosis of influenza A and B virus infections. Purified hemagglutinin in subtype-specific diagnosisI Julkunen, R Pyhälä, T HoviPageof 6