In the United States, the full magnitude and impact of errors in health care was not appreciated until the 1990s, when several reports brought attention to this issue.
在美國，醫療保健領域當中各種差錯的整個數量和影響一直並未得到認識，直到二十世紀90年代，幾份報告才引起了人們對這一問題的關注。