Virus, known in Japan as Fukkatsu no Hi (復活の日, lit. "Day of Resurrection"), is a 1980 Japanese post-apocalyptic science fiction film directed by Kinji Fukasaku. Based on Sakyo Komatsu's 1964 novel of the same name, the film stars an international ensemble cast featuring Masao Kusakari, Sonny Chiba, George Kennedy, Robert Vaughn, Chuck Connors, Olivia Hussey, Edward James Olmos, Glenn Ford, and Henry Silva.

At the time of its release, the film was the most expensive Japanese film ever made.