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Update: Influenza Activity -- United States

In Alaska, widespread outbreaks of influenza-like illness were reported for the fifth consecutive week (November 30, through December 28, 1985). Fifty-one type A(H3N2) and 40 type B influenza viruses have now been isolated this season. In Hawaii, type A(H3N2) viruses were isolated from six students in a Honolulu school, where a cluster of influenza-like illnesses occurred in mid-December. One type A(H1N1) virus had been isolated in Hawaii from a sporadic case in November (1).

California, Montana, Nevada, Pennsylvania, and Wisconsin have reported their first influenza virus isolations of the season from residents whose illnesses occurred from mid- to late December. Six type B viruses were isolated from patients near Philadelphia, Pennsylvania; five type B viruses were isolated from patients in Milwaukee, Wisconsin; and type B viruses were isolated from patients in Berkeley, California, and Helena, Montana. Type A(H3N2) virus was isolated from a patient in Las Vegas, Nevada.

Nationwide, weekly reports of influenza-like illnesses seen in November and December* have been in the range typically noted in the absence of extensive outbreaks. The percentage of deaths associated with pneumonia and influenza reported from the 121 cities has also remained in the range expected in the absence of extensive outbreaks through November and December. Reported by D Ritter, Northern Regional Laboratory, JP Middaugh, MD, State Epidemiologist, Div of Public Health, Alaska Dept of Health and Social Svcs; G Kobayashi, Laboratories Br, C Ibara, S Terrell-Perica, MPH, AP Liang, MD, State Epidemiologist, Hawaii Dept of Health; J Schlieble, PhD, Viral Disease Laboratory, J Chin, MD, State Epidemiologist, California Dept of Health Svcs; J Brinker, Microbiology Laboratory, J Gedrose, RN, State Epidemiologist, Montana State Dept of Health and Environmental Sciences; R Reichelderfer, PhD; J Clark, Sunrise Hospital, Las Vegas, GE Reynolds, MD, State Epidemiologist, Nevada State Dept of Human Resources; C Schultheis, MD, King of Prussia, B Kleeger, PhD, State Public Health Laboratory, EJ Witte, VMD, State Epidemiologist, Pennsylvania State Dept of Health; G Sedmak, PhD, Milwaukee Health Dept, JP Davis, MD, State Epidemiologist, Wisconsin State Dept of Health and Social Svcs; participating physicians of the American Academy of Family Physicians; Statistical Svcs Br, Div of Surveillance and Epidemiologic Studies, Div of Field Svcs, Epidemiology Program Office, Influenza Br, Div of Viral Diseases, Center for Infectious Diseases, CDC.


  1. CDC. Update: influenza activity--United States. MMWR 1985;34:741-2, 747. *These illnesses are reported by physician members of the American Academy of Family Physicians Research Panel, who serve as sentinels for influenza.

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