Outlined below are a list of common childhood diseases and the Pre-School policies regarding exclusion periods to prevent the spread of infection. 

Chickenpox
Usual Incubation Period: 11-21 days
Minimal Period of Exclusion: 6 days from onset of rash.

German Measles
Usual Incubation Period: 14-21 days
Minimal Period of Exclusion: 14 days from onset of rash-please inform school so we can notify parents.

Measles
Usual Incubation Period: 10-15 days
Minimal Period of Exclusion: 7 days from onset of rash.

Mumps
Usual Incubation Period: 15-24 days
Minimal Period of Exclusion: Until swelling has subsided.

Whooping cough
Usual Incubation Period: 7-10 days
Minimal Period of Exclusion: 21 days from onset of paroxysmal cough.

Impetigo
Usual Incubation Period: varied
Minimal Period of Exclusion: until spots have healed.