The lab has made new progress; some zombies are indeed recovering, but no matter how they research, there's always a threshold they can't overcome.
After all, the recovering zombies are only a few; ninety-nine percent of the zombies remain the same.
So, no matter what technical challenges they face, they have to overcome them, as so many people are waiting for their rescue.
In the blink of an eye, a few years have passed. The number of zombies on one side of the city wall keeps increasing, while humans reclaim their homeland, gradually restoring the cities.
The plants on that side grow rapidly, almost blocking out the sun with their lush greenery, enveloping the city in green.
What were once ordinary little grasses can now grow half as tall as a person.
All the plants seem to have become plants of a giant's country.
Humans become tiny amidst those plants.
The good thing is that there is plenty of food to eat.
