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.
Answered 9/28/2016
6.3k views
Only before rash app: Fifth disease in no longer contagious as soon as the rash is present & the diagnosis is made possible.
Answered 9/30/2020
5.5k views
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