Front inside cover: Illustration of the 2019 novel Corona virus (2019-nCov virion); Credit: CDC/ Alissa Eckert, MS; Dan Higgins, MAM, from the Centers for Disease Control and Prevention's Public Health Image Library (PHIL), with identification number #23312. This virus, informally known as the Wuhan coronavirus, is a contagious virus that causes 2019-nCoV acute respiratory disease, a respiratory infection. It is the cause of the ongoing 2019–20 Wuhan coronavirus outbreak, a global health emergency. A cure for this has not yet been found, and it has become one of the top priorities across the world.