Moreover, favipiravir, also known as T-705 or Avigan, is in use against YFV and WNV infections (as well as infections caused by arenaviruses, bunyaviruses, and alphaviruses) (19), and host-directed compounds, such as cyclophilin inhibitors (20, 21) and α-glucosidase inhibitors (22), have been evaluated in clinical trials to control HCV and dengue virus (DENV) infections, respectively. The gene discussed is PPIB; the disease is infection.