Although the origin of the zombie pandemic is unknown, the story begins in China after an unknown🌈 creature bites a young boy (who becomes the official Patient Zero). The Chinese government attempts to contain the infection and🌈 concocts a crisis involving Taiwan to mask their activities.

Simple, he's already been infected with a deadly disease and the zombies🌈 ignore him. He had no chance of fighting his way out of that apartment with so many zombies pouring the🌈 one door unless he was already sick. If this is the case, the answer was right under Brad Pitt's nose🌈 the entire time.