A genre focused on the lives of teenagers and young adults during their (potentially metaphorical) journey into adulthood, where the characters typically overcome obstacles to learn lessons about being an adult as they figure out what's most important to them.
Shambling undead humans who died after being infected by some sort of virus and are now "alive" again, commonly known for the desire to kill living human beings. Commonly paired with the (post-)apocalyptic genre.
