I’ll be honest. This commercial is so weird, yet so well done, I’m really not sure if it’s an official FedEx commercial.  are the makers of the video, and their page says they are from Hong Kong. 

A group of zombie apocalypse survivors hiding in a store debate if they should take out of their own after he was bit. Without the needed antidote, he would surely turn to a zombie! Thankfully, Federal Express delivers fast.