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The period between becoming infected and the start of plague symptoms is called the plague incubation period. The bubonic plague incubation period is typically two to six days. The primary pneumonic plague incubation period is usually one to three days.
Slapped cheek disease (also known as fifth disease or parvovirus B19). Incubation 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.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.