We found that while taurocholic acid (TCA) specifically inhibited infection of Huh-106 cells with HDV particles produced with HBV GPs, as expected12, antibodies against LDLr and CD81 (i.e., one of the HCV receptors) blocked the entry of VSV-∆p and HCV-∆p particles, respectively, though LDLr antibodies exhibited some nonspecific levels of inhibition. The gene discussed is CD81; the disease is infection.