Banba agrees to work for Saruhiko labs.  He's invited to their lowest level, where the cause of all the incidents is revealed. Then it gets loose...
A biological weapon.
سِلاح بيولوجي
Eine biologische Waffe.
Un arma biológica.
Un arma biológica.
Une arme biologique…
Armi biologiche?!
Uma arma biológica.