28 Days Later...

A group of animal rights activists breaks into a lab and releases chimpanzees from their cages to rescue them, despite warnings from a scientist that the chimpanzees are contagious. As a result of the animal rights activists' actions, a virus that the chimpanzees contained spreads rapidly across Great Britain and infects numerous people. Jim, who fell into a coma following a bicycle accident shortly before the virus was released, emerges from his coma and finds that London is deserted. He realizes that he is not alone, as within the city there are those that have been infected and those that have not. Jim manages to find more survivors and they head out to Manchester, where a group of British military personnel offer protection of any survivors from the infected. However, Jim and his colleagues have no idea what they're in for.