Parvovirus B19 can cause fifth disease or erythema infectiosum, an illness that afflicts children primarily. Fifth disease usually features a mild rash along with fever, runny nose, and headaches. Most people develop the condition within two weeks of a parvovirus B19 infection. "Fifth" disease gets its name from the traditional belief that it was the fifth disease to affect children. Treatment is typically not necessary, as the condition will resolve without it.
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