The film "28 Days Later" (2002) and its sequel "28 Weeks Later" (2007) revolves around a virus in Britain that turns anyone infected into a mindlessly violent psychotic, though still alive and not undead, in a variation of the classic zombie theme. This also makes the infected more dangerous, as they can run very quickly and as their bodies are not decaying. The plot centers on groups of both uninfected survivors and a handful of virus carriers who are immune to the effects of the disease.