How long is my child contagious with fifth disease?

Only before rash app. Fifth disease in no longer contagious as soon as the rash is present & the diagnosis is made possible.
Until after the rash. Fifth disease, caused by parvovirus b19, is contagious from before symptoms begin, until the rash appears. When the rash appears, the patient is getting well, and only a little contagious (unknown exactly "how contagious"). Kids are allowed to return to school a couple of days after the rash appears.