RENBP and Huntington disease: Another study found that the sensitivity, specificity, and accuracy of the combined Ag/Ab test applied for early detection of HCV infection among HD patients were higher than that of anti‐HCV antibodies detection test (95.45%, 94.1%, and 94.87% vs 81.8%, 88.23%, and 84.6%), which means that the combined Ag/Ab test can be as an alternative to HCV‐RNA detection.38