Highschool of The Dead

Highschool of the Dead (学園黙示録 HIGHSCHOOL OF THE DEAD Gakuen Mokushiroku Haisukūru obu za Deddo^?) is a manga series written by Daisuke Satō and illustrated by Shōji Satō.
Highschool of the Dead is set in present day 2010 Japan, beginning as the world is struck by a deadly pandemic that turns humans into zombies, euphemistically referred to by the main characters as "Them" (奴ら Yatsu-ra^?).
The story follows a group of high school students, the school's nurse, and a young girl as they fight their way to safety through the deadly streets of Japan during the worldwide catastrophic event known as the "Outbreak". As the cast tries to survive the zombie apocalypse, they must also face the additional threats of societal collapse, in the form of dangerous fellow survivors, and the possible decay of their own moral codes.
Source: http://en.wikipedia.org/wiki/Highschool_of_the_Dead

Episodes:
Highschool of The Dead Episode 1
Highschool of The Dead Episode 2
Highschool of The Dead Episode 3
Highschool of The Dead Episode 4
Highschool of The Dead Episode 5
Highschool of The Dead Episode 6
Highschool of The Dead Episode 7
Highschool of The Dead Episode 8
Highschool of The Dead Episode 9
Highschool of The Dead Episode 10
Highschool of The Dead Episode 11
Highschool of The Dead Episode 12 (End)

Source: http://www.animefushigi.com/