S. Aasen

Measles antibodies and herd immunity in 20- and 40-year-old Norwegians.

B. Berdal, L. Flugsrud, T. Rłd, 1997, Scandinavian journal of infectious diseases.

Descriptive epidemiology of infections due to thermotolerant Campylobacter spp. in Norway, 1979–1988

G. Kapperud, S. Aasen, 1992, APMIS : acta pathologica, microbiologica, et immunologica Scandinavica.

Clinical features of sporadic Campylobacter infections in Norway.

S. Ostroff, G. Kapperud, J. Lassen, 1992, Scandinavian journal of infectious diseases.

Clinical features of sporadic Yersinia enterocolitica infections in Norway.

S. Ostroff, R. Tauxe, R. Tauxe, 1992, The Journal of infectious diseases.

An outbreak of ornithosis in Norway in 1981.

A. Bruu, L. Flugsrud, S. Aasen, 1984, Scandinavian journal of infectious diseases.

Chlamydia pneumoniae infections in Norway 1981-87 earlier diagnosed as ornithosis.

A. Bruu, H. Myrmel, G. Haukenes, 1991, Scandinavian journal of infectious diseases.

The epidemiology of meningococcal disease in Norway 1975-91.

A. Lystad, S. Aasen, 1991, NIPH annals.

Recent meningococcal epidemiology in Norway. Eight years of serotyping for strain characterization

D. Caugant, S. Aasen, L. Frøholm, 1991 .