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Update: Influenza Activity -- United States
Recent data from leading indicators show static or declining
levels of influenza activity. The average number of cases of
influenza-like illness reported by family physicians for the
reporting
week ending February 20, 1985, was 8.2, continuing the trend since
the
apparent peak of 11.2 cases for the reporting week ending January
30.
The preliminary total of influenza virus isolates reported for the
week ending February 22 was 197, a decrease from the approximately
250
isolates reported for each of the preceding 3 weeks. A total of 21
states indicated the occurrence of widespread or regional outbreaks
of
influenza-like illness for the week ending March 2, compared with
the
26 states that indicated similar levels for the preceding week
(Figure
1).
Of total deaths reported from 121 cities for the week ending
March
2, 7.3% were associated with pneumonia or influenza (P&I),
unchanged
from the preceding week. Changes in numbers of P&I deaths
typically
lag behind morbidity indices.
Reported by 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, Influenza Br, Div of Viral Diseases, Center for Infectious
Diseases, CDC.
Disclaimer
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