Update:
Nexon increased the hp of the chosen zombie and the infected zombies again. The chosen zombie gets 800 hp Yippie. Then the infected zombies i believe 350? Correct me if im wrong im just doing this by memory. Good luck winning another round of Overdose.
Confirmed 1/2 : I have confirmed if you get infected by a host you will have 375 hp. Still trying to get the host zombie hp because its hard to get selected
Full Confirmation here it is:
Host Zombie: 750 hp
Infected Zombie: 350 hp