An outbreak of legionnaires disease caused by long-distance spread from an industrial air scrubber in Sarpsborg, Norway.

Nygård, K.; Werner-Johansen, Ø.; Rønsen, S.; Caugant, D.A.; Simonsen, Ø.; Kanestrøm, A.; Ask, E.; Ringstad, J.; Ødegård, R.; Jensen, T.; Krogh, T.; Høiby, E.A.; Ragnhildstveit, E.; Aaberge, I.S.; Aavitsland, P.