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Epidemiology of a Small Pertussis Outbreak in Kent County, Michigan

Harold J. Lambert
Public Health Reports (1896-1970)
Vol. 80, No. 4 (Apr., 1965), pp. 365-369
DOI: 10.2307/4592424
Stable URL: http://www.jstor.org/stable/4592424
Page Count: 5
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Since scans are not currently available to screen readers, please contact JSTOR User Support for access. We'll provide a PDF copy for your screen reader.
Epidemiology of a Small Pertussis Outbreak in Kent County, Michigan
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Abstract

The 89 families in which at least 1 member harbored Bordetella pertussis formed the group studied in a 1962 pertussis outbreak in Kent County, Mich. Approximately one-half of the 474 family members had been vaccinated previously with 3 or more injections of pertussis vaccine. All susceptible unvaccinated persons acquired pertussis during the study, as did 46 percent of vaccinated family members. B. pertussis was isolated from 2 healthy as well as 69 ill vaccinated persons. The increased incidence of pertussis in vaccinated persons was directly related to the interval since the last injection of pertussis vaccine.

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