The clinical syndrome among identified cases is acute hepatitis (liver inflammation) with markedly elevated liver enzymes.

已确定病例的临床综合征是急性肝炎（ 肝脏炎症） 伴有肝酶显着升高。

As of 21 April 2022, at least 169 cases of acute hepatitis of unknown origin have been reported from 11 countries in the WHO European Region and one country in the WHO Region of the Americas (Figure 1).

截至 2022 年 4 月 21 日，世卫组织欧洲区域的 11 个国家和美洲区域的一个国家至少报告了 169 例不明原因急性肝炎病例（ 图 1） 。