Daily incidence curves for FRED pandemic influenza model under five school closure scenarios. The baseline scenario assumed no school closures. For the other scenarios, individual schools in Allegheny County are closed the next day after 10 symptomatic students attended the school. The duration of the closure varied from 2 to 8 weeks. Regardless of the duration of the school closure, a secondary epidemic peak occurs when all the schools reopen.
Grefenstette et al. BMC Public Health 2013 13:940 doi:10.1186/1471-2458-13-940