Zombies are believed to be fictional ranimated corpses, but it is an actual medical alement.  About 5% of the nation suffers from it.  Symptoms vary, but often include, slow heart rate, a desire to eat raw meat, and loss skin color.  Zombies are often considered to be undead, a rumor resulting from multiple hollywood portrayals in horror movies.  Actually, many zombies go on to live very normal lives.