Tracing Dobrava Hantavirus Infection

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Abstract
In 1991, Ukraine experienced a return of epidemic diphtheria after decades of control that had resulted in 50% of the oblasts (provinces) in the country, and by 1995, all regions were affected. In 1995, at the peak of the epidemic, >5000 cases and >200 deaths were reported. As in Russia, >80% of these cases were diagnosed in persons 16–59 years old. In 1993, the government of Ukraine initiated a program of increased immunization among children and at-risk adults, and by 1995, a mass immunization strategy was adopted in an effort to arrest the epidemic, which was increasing exponentially. In 1996, the number of cases started to decrease, and data from 1998 indicate that the downward trend has continued. It is likely that the diphtheria epidemic in Ukraine started among children, who had been left vulnerable due to inadequate childhood immunizations, and then quickly spread to inadequately protected adults.

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