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Update: Influenza Activity -- Europe, United States

Europe: Although influenza activity occurred at low levels in many countries during late 1984 and early 1985, the level of activity increased in some European countries during February. Influenza type A(H3N2) has remained the predominant virus strain, but some outbreaks of type B and, to a lesser extent, type A(H1N1) have occurred this season.

Following the widespread outbreaks during January 1985 in the Union of Soviet Socialist Republics and Norway (1), during February, influenza type A(H3N2) activity increased to widespread levels in the Federal Republic of Germany, the German Democratic Republic, Sweden, and Finland. The incidence of influenza-like illness also increased in southern France, where type A(H3N2), type B, and a few type A(H1N1) viruses were isolated. Influenza type A(H1N1) viruses were isolated in Switzerland in association with sporadic cases and localized outbreaks among children. An outbreak of influenza type B, affecting all age groups, occurred in Greece.

United States: Influenza morbidity and mortality continue to decline (Figure 2). For the week ending March 16, no state reported widespread outbreaks of influenza-like illness, and eight states reported regional outbreaks. For the preceding week, three states had reported widespread outbreaks, and 13 states regional outbreaks, of influenza-like illness. The most recent week that no state reported widespread outbreaks ended January 12. Of total deaths reported by 121 cities for the week ending March 16, 6.3% were associated with pneumonia or influenza, compared with the 6.2%, 7.3%, and 7.3% of the total deaths that were associated with pneumonia or influenza for the 3 preceding weeks. Reported by Virus Diseases Unit, World Health Organization, Geneva Switzerland; Participating physicians of the American Academy of Family Physicians; State and Territorial Epidemiologists; State Laboratory Directors; Other collaborating laboratories; Statistical Svcs Br, Div of Surveillance and Epidemiologic Studies, Epidemiology Program Office, WHO Collaborating Centre for Influenza, Influenza Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.


  1. CDC. Update: influenza activity--worldwide, United States. MMWR 1985;34:114-6.

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