"Can't...... Because the origin of zombies is the virus, why can zombies live without eating or drinking until now, is that the virus splits and replicates like bacteria, a bucket of water can extinguish a bonfire, but it can't extinguish a burning oil barrel, zombies can live until now, that kind of substance also accounts for a large proportion, the substance reacts with the virus, relatively speaking, it also gives the zombies new energy, as long as that substance does not disappear, the zombies can live forever......"

If Zhang Xiaoqiang knew about the canned food incident that happened in the five towns, he would understand how correct the doctor was, the zombies swarmed and ate the rotting zombies, and D2 ate the shiny brains.

As the doctor continued, they knew that not all zombies could be maintained, the rate of virus production was the same as the rate of consumption, and some zombies were not good because of their pre-apocalyptic physique, and after becoming zombies, they continued to weaken, and when the virus in their bodies was exhausted, it was time for them to die.

This is also why Zhang Xiaoqiang found that some zombies are becoming stronger and stronger, while others are becoming thin and fragile.

"If the virus in the corpse replicates faster than it reacts with an unknown substance, and the zombie gets enough energy, does it need food to evolve?"

"Theoretically feasible, zombies need energy to survive first, as long as the energy is sufficient, they will accumulate and undergo qualitative changes, the S type D and type 2 and type 3 you said are all accumulated in this way, but the fresh blood food replicates the virus in their bodies faster......"

Then the doctor made a new idea for them, after the dead zombies decayed, they would become a delicious food second only to blood food, although the effect was not as good as blood food, it was a great supplement to zombies, in other words, zombies would only live more and more powerful...... "rely on ...... Depend on...... Depend on...... Mother...... Target...... Mother...... Target...... Le Gobi, that is, there will be no ordinary zombies in the future, only evolutionary zombies? And the damn thing is that zombies will continue to evolve, keep evolving, just one d3, rockets can't hurt the skin, and when countless d3s appear, either we hide like mice, or, let's wipe our necks together? ”

Zhang Xiaoqiang was furious, he opened his mouth and scolded, it was the unlucky doctor Shen Li who was scolded by him, Shen Li was not impatient, nor angry, for him, except for zombies, everything is floating clouds, Zhang Xiaoqiang was scolding, but the doctor reached out and took out a piece of candy from his pocket and threw it into his mouth...... Crunched ......, looking at Zhang Xiaoqiang's big mouth while chewing, and when Zhang Xiaoqiang stopped his mouth, his candy had just finished eating.

"It's impossible to evolve all of them to level 3 or above, zombies eat a lot of people, as long as you are lucky in a place, a zombie can always get some meat, right? But why are there so few type 2 zombies and even fewer type 3 zombies, I have learned about your record, you have killed hundreds of thousands of zombies, and you have encountered less than two hundred type 2 zombies in total, and only one type 3 zombie, which is very revealing......"

The doctor believes that the evolution of zombies is also about qualification and luck, different levels, and different conditions for evolution, just like cannibalism, five zombies eat the same person, they eat at the same speed, and the amount of food is the same, and in the end, only one zombie successfully evolves, why is this?

Similarly, first-level zombies eat people, they may eat as much as type 2 zombies, but they have never evolved to type 2, Zhang Xiaoqiang left the house, type 2 zombies have appeared, and now, the ratio of type 2 zombies seems to be 1,005 to one, this is still lucky, they have eaten enough food to allow them to evolve, and there are more, it is possible that the zombies who have evolved type 2 have eaten blood food until now.

In this way, then it is not only 1,500 to 1, 3,000 or even 4,000 to 1 is also possible, and the doctor also believes that zombies have reached a bottleneck when they reach type 2 zombies, and they want to become type 3 zombies, they will need more food, and this food must also be massive, in addition to this, there may be some other conditions, but humans don't know it yet.

"That's right...... We found something strange in D3's lair......"

At the beginning, Zhang Xiaoqiang didn't see the second zombie in D3's lair, and they didn't care, and after they completely cleaned up the D3 zombies, Wang Le took people to put oil on those scrapped cars, they collected gasoline while looking for materials that could be used, and in the end, they found a big pit.

The pit is full of corpses, the corpses of zombies, each zombie has no skull, countless headless zombies fell together, and were burned by Wang Le and them, although it is a little weird, thinking that this is in D3's lair, no matter how weird it is, it seems normal, and now, the doctor said that the conditions needed for the evolution of type 3 zombies, Zhang Xiaoqiang put this matter out.

"It's possible that it was made by D3 zombies, the zombies' brains contain the most viruses, I've always suspected that zombies are actually controlled by viruses, I've heard you say that zombies have intelligence, the higher the level, the higher the wisdom, I'm not sure."

"By the way, what's the point about what you said about our reduced chance of infection?" Zhang Xiaoqiang suddenly remembered what the doctor said at the beginning, which was related to them.

Unconsciously, the doctor's mop cloth-like hair hung down again to block his round-rimmed glasses, and the doctor shook his head in a dashing manner, revealing his glasses that were not much cleaner than the windows of the long-distance bus, and said with a slight intellectual arrogance:

"It's still the substance in the air, I found, it seems to be related to natural phenomena, and the first heavy rain allowed the zombies to get plenty of ......"

"Wait...... You said...... What was in the first heavy rain? ”

Zhang Xiaoqiang was tortured by the first rain to death, the heavy rain made him, but also made him suffer from hell, for him, the rain is mysterious, dangerous, but what he wants to know the most.

"Yes, I observed that the evolution of zombies began after the heavy rain, and I also met some survivors, they all drank the rain before they became zombies, no matter how little they drank, they all became zombies, I think, the heavy rain is actually the source of the virus, they were in the air at the beginning, although I don't know what caused it, I believe ......"

What the doctor said made Zhang Xiaoqiang secretly rejoice, he was so lucky that he was against the sky, of course, he was just splashed by the rain, but that was terrible, the source.

From the doctor's description, everyone began to understand the true face of the virus, in the final analysis, on the day of the virus, everyone was infected with the virus, or rather, every gasping thing on the earth was infected with the virus, but the human response to this virus is the largest, and the vast majority of people have become zombies, and those who are lucky enough to escape the catastrophe have become food for zombies.