film 28 Days Later (2002) and its sequel 28 Weeks Later (2007), House of the Dead (2003), a 2004 Dawn of the Dead remake and the British parody movie Shaun of the Dead (2004). The success of these films led to the zombie genre reaching a new peak of commercial success not seen since the 1970s. Zombie films created in the 2000s have featured zombies that are more agile, vicious, intelligent, and stronger than the traditional zombie. These new fast running zombies have origins in video games, including Resident Evils running zombie dogs and particularly The House of the Deads running human zombies. In the late 2010s, zombie films began declining in the Western world. In Japan, on the other hand, the low-budget Japanese zombie comedy One Cut of the Dead (2017) became a sleeper hit, making box office history by earning over a thousand times its budget. Different types of zombies Characteristics of zombies vary from film to film. Each filmmaker gives his or her zombies a unique set of qualities for the universe of that film. While zombies are often portrayed as slow-moving, such as in Night of the Living Dead, other films such as World War Z (2013) depict fast-moving zombies that can run. The zombie outbreak can also be caused by a variety of sources. Many films have zombies that are people infected with a zombie virus, while other films give different causes for the zombie outbreak. Radiation from a space probe causes the dead to attack the living in Night of the Living Dead. In Train to Busan (2016), the zombie outbreak is caused by a chemical leak. In The Girl with All the Gifts (2016), the zombie disease is caused by a fungus. The transformation from human to zombie is also different from film to film. The transformation process can take only minutes, such as in World War Z, or it can take several hours, such as in Night of the Living Dead. In Friend of the World (2020), zombies can morph their bodies to merge with people. Zombies also have different weaknesses in different films. In most films, zombies can only be killed by destroying the brain, often by gunshot to the head. However, in Night of the Living Dead, the zombies are also repelled by fire. A few films also portray zombies as sentient beings. Warm Bodies (2013) is a zombie romantic