当一种名曰胆红素的物质在血液中累积时，会出现黄疸。
Jaundice occurs when there is a build-up of a naturally occurring substance in the blood called bilirubin.
通常6岁以下受感染儿童没有明显的症状，只有10%的人出现黄疸。
Infected children under six years of age do not usually experience noticeable symptoms, and only 10% develop jaundice.
假如胆囊也受到影响，会出现黄疸：白眼球发黄、甚至身体也发黄。
If gallbladder also is affected, can appear icteric: hair of supercilious look ball is yellow, even the body also is sent yellow.
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