incubation periods for childhood illnesses
Incubation period: Between 1 and 3 weeks. Infectious period: The most infectious time is 1-2 days before the rash appears, but it continues to be infectious until all the blisters have crusted over. Symptoms: Chickenpox is a mild infectious disease that most children catch at some time.It starts with feeling unwell, a rash and, usually, a fever.ncubation period: 1-20 days. Infectious period: A few days before the rash appears (children are no longer contagious when the rash appears). Symptoms: 1  It begins with a fever and nasal discharge. 2  A bright red rash, like the mark left by a slap, appears on the cheeks.