Characteristics of influenza outbreaks and class closures.
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*Standard: two-day class closure carried out the day after reaching or exceeding a 10% student absentee rate due to influenza.†Non-standard: closures other than Standard.‡One-day: one-day class closure carried out after a 10% student absentee rate.§Delayed: two-day or three-day class closures carried out two days or more after a 10% student absentee rate.∥Non-closure: no class closure even at 10% absentee rates.¶Combined: non-standard + non-closure.
创建时间:
2015-12-02



