Chương 467: New Clue

Fang Heng made a rough deduction in his mind.

Even if he could continue developing and optimizing the vaccine in District 7, greatly increasing the level of the vaccine antibodies and reducing the speed and intensity of the zombie mutation, how long would it take to produce the amount of vaccine needed to purify the entire world, not to mention purify the entire world?

Fang Heng could already envision an extremely long battle ahead.

And in the long battle, the Federation and Night Owl would come looking for trouble for him!

"Annoying! " Fang Heng rubbed his shoulders.

Perhaps there were other ways to trigger other quests to complete the main storyline faster.

Currently, there were only two clues left that could be traced.