这个词是什么意思？
The number of new cases of a given disease during a given period in a specified population. It also is used for the rate at which new events occur in a defined population. It is differentiated from PREVALENCE, which refers to all cases in the population at a given time.
中文名称索引；定义为 MeSH 英文原文，尚未逐条译审。MESH:D015994 · MeSH 2026。
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