Treating one disease caused another

Egypt’s public health service inadvertently spread hepatitis C while treating patients for schistosomiasis, a common parasitic disease, with injections of antischistomal medications.

Hepatitis C, a viral infection that can lead to liver failure, is surprisingly common in Egypt. Up to 20 percent of people there test positive for the chronic illness. Now, a study of almost 8,500 Egyptians shows that reused needles spread the disease.