| 单词 | fifth disease |
| 释义 | fifth disease Pathol. a mild infection, most often seen in children or young adults, caused by a small virus (the human parvovirus B19) and marked by a blotchy rash on the cheeks, arms, and legs. Also called erythema infectiosum. [so called because it was the fifth in a classification scheme of childhood eruptive diseases] |
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