Strep Throat - Prognosis
Patients with strep throat usually begin feeling better about twenty-four hours after first taking antibiotics. Symptoms rarely last longer than five days.
People remain contagious until they have been taking antibiotics for twenty-four hours. Children should not return to school until they are no longer contagious. Food handlers should not work during the same time period. People who are not treated with antibiotics may continue to spread strep bacteria for several months.

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