Congenital rubella syndrome among the Amish--Pennsylvania, 1991-1992.

From February through May 1991, an outbreak of rubella occurred among the Amish in Pennsylvania that was part of a widespread rubella outbreak reported among the Amish in at least six states during 1991 (1). The Pennsylvania Department of Health (PDH), in cooperation with CDC, conducted an investigation to document cases of rubella among pregnant Amish women in Lancaster County and a cohort study to estimate the risk for congenital rubella syndrome (CRS) among infants born to Amish mothers from November 1, 1991, through January 31, 1992. This report summarizes investigation and study findings.