CDC influenza surveillance report no. 45, March 20, 1959
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CDC influenza surveillance report no. 45, March 20, 1959

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      "Twenty States and the District of Columbia have now reported outbreaks of influenza-like illness, or laboratory confirmations of the presence of influenza since early in February, 1959. In ten of these States and the District isolation or serologic study has confirmed the presence of Type B influenza. All reports indicate that this virus is closely related to other Type B influenza agents which have been isolated in this country and abroad in the past few years. No additional Type C isolates have been reported in 1959 since the report from Michigan in mid-February. Asian (A2) isolations have been reported to date in 1959 only from New York City (a total of 4 isolates now) and Miami Florida (one isolate from a family outbreak). Other Type A agents, not yet characterized as to subtype, have been reported from Utah and California. Influenza and pneumonia deaths for the week ending March 14, rose slightly (to 517) from the level of the previous five weeks. The figure still stands close to the normal threshold. The greatest increases in reported deaths over the previous week were recorded from the Middle Atlantic and Pacific States. The absence of excess influenza and pneumonia mortality appears to be consistent with the fact that the majority of outbreaks are occurring among school children. The adult population seems to have been little affected to date, perhaps as the result of prior experience with similar strains of Type B. Industrial absentee rates remain normal for the season. It may be worthy of note, in considering the absence of excess mortality, that the Type B illness has been generally reported as milder and of shorter duration than the illness caused by the Asian (A2) strain." - p. 2
    • Content Notes:
      March 20, 1959. This report was prepared by Dr. Frederick L. Dunn, Chief, Surveillance Unit, CDC. "For official use only; not for publication." - cover "Information contained in this report is a summary of data reported to CDC by State Health Departments, Epidemic Intelligence Service Officers, collaborating influenza diagnostic laboratories, and other pertinent sources. Much if it is preliminary in nature and is primarily in nature and is primarily intended for those involved in influenza control activities. It is understood that the contents of these report will not be released to the press, except by the Office of the Surgeon General, Public Health Service, U.S. Department of Health, Education and Welfare. State Health Officers, of course, will judge the advisability of releasing any information from their own state." - cover
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