Interestingly, DF1dOASL+/+ and DF1dRIG-I+/+ cells showed comparatively lower levels of DK/49 and GS/65 virus titers compared to DF1 cells expressing empty vectors, supporting that duck OASL can efficiently prevent viral infection, similarly to duck RIG-I (Figures 2A,B). The gene discussed is OASL; the disease is viral infectious disease.