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CDC influenza surveillance report no. 44, March 13, 1959
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    I. Summary of information -- II. Current analysis of influenza in the United States -- III. Current analysis of influenza and pneumonia mortality -- IV. Influenza in Europe -- V. Comparison of several Type B influenza strains by Hemoagglutination-inhibition tests

    "Sharp, well defined outbreaks of respiratory illness, mild in character and affecting mainly children of school age, have continued to occur in several areas. Besides the B isolations previously reported in Maryland and Michigan, influenza B virus has been recovered from throat washings of cases in schools in Washington, D.C. serologically confirmed outbreaks have been reported in Massachusetts, Indiana, Iowa, and Alabama. Epidemics of respiratory illness of etiology not yet identified have been reported in some counties in California, New York, Mississippi, and Georgia. During the last three weeks, influenza and pneumonia deaths in 108 selected cities have leveled off at about 10% above the deaths reported the week ending February 14. They are still well within the "epidemic threshold" and far below the number reported during the corresponding period of last year when the country was experiencing the second wave of the A-2 epidemic. In Europe, outbreaks are occurring in West Germany, Belgium, France, Switzerland, and England where a sharp increase in influenza and pneumonia mortality has been noted in the last three weeks. Strains similar to A-2 have been isolated in Bulgaria according to the WHO Weekly Epidemiological Record. A comparison of several type B influenza strains by tests performed by Dr. R.Q. Robinson from the CDC Virus Laboratory in Montgomery, Alabama is presented." - p. 2

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