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An infection rate (or incident rate) is the probability or risk of an infection in a population. It is used to measure the frequency of occurrence of new instances of infection within a population during a specific time period.

An infection rate (or incident rate) is the probability or risk of an infection in a population. It is used to measure the frequency of occurrence of new instances of infection within a population during a specific time period.

感染率（或发病率）是人群中感染的可能性或风险。 它用于衡量特定时间段内某个人群中新感染病例的发生频率。

感染率（或发病率）是人群中感染的可能性或风险。 它用于衡量特定时间段内某个人群中新感染病例的发生频率。