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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
Published by: Association of Schools of Public Health
Stable URL: http://www.jstor.org/stable/4592424
Page Count: 5
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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.
Public Health Reports (1896-1970) © 1965 Association of Schools of Public Health