The relocation of the base is finally over, and it took the Tigers far longer than expected to complete the task, and it has to be said that the zombies who started to use the tools were even more difficult to deal with than before.

The situation is becoming more and more dire, and although the base has informed several survivor camps that have established communication links with the base of the latest information about the zombies, it is clear that these people have not paid enough attention to the situation. Soon, these camps sent out distress signals one after another, asking the base to send people to help find the whereabouts of their field personnel.

In the conference room, the members of the Tiger team had just finished listening to the mission briefing, but Dr. Mei broke in in a hurry.

"Sit it back for me." Dr. May said in a tone of no doubt: "None of you are allowed to set off until I finish speaking!" ”

After the human body is attacked by zombies, the Z-type enzyme enters the body's blood circulation system along the wound. White blood cells in the human body have many responsibilities, one of which is to engulf foreign substances and produce antibodies.

After the Z-type enzyme enters the human body, the white blood cells will desperately devour the invader, and then they will be infected by the Z-type enzyme and produce more Z-type enzymes, so the human body will begin to have high fever, convulsions and other zombie symptoms, until the Z-type enzyme completely defeats the white blood cells and obtains control of the human brain, and the infected person will die.

Subsequently, the Z-type enzyme began to resurrect the dead, which, of course, was not really resurrection. The first is the brain part, the Z-type enzyme only controls a small part of the human brain, and a large part of it belongs to the area that is not developed by humans themselves. Secondly, the human body is a complex machine, and cells die when they lack oxygen, and the blood in the zombie obviously does not have the function of carrying and transporting oxygen, as evidenced by the rancid smell emitted from the zombie.

The reason why the zombies can maintain this semi-corrupt state all the time is also due to the effect of this enzyme. Decaying bacteria attach to the bodies of zombies and provide a constant supply of energy for the Z-type enzymes, which is why zombies do not end up in a puddle of stinky water or starve to death because they don't have enough food over time.

There is reason to believe that zombies themselves can live forever without any food, as long as the Z-type enzyme is always present in the zombie's body. Regarding the consumption of zombies, Mei Qiu and her medical team have also conducted a lot of research.

Brain scans of zombies show that when zombies spot their target, a mysterious area of their brain begins to enter an abnormally active state, and it does not calm down until the target disappears for a long time, while the area in the brain responsible for hunger signals does not respond at all.

Many people have become zombies because they have been bitten, and judging from the information fed back from the Tiger Squad's outing, no corpse has ever been found that has been completely eaten, which can also prove Mei Qiu's judgment from one side.

If zombies attack humans only out of the most primitive need for food, then when a living person is surrounded by a group of zombies and eats them, all that is left is a pile of dry bones, not a new zombie. Therefore, the purpose of the zombie attack on humans is likely to have nothing to do with the original food that people expected, and according to the analysis of the data, Meiqiu made her own judgment.

The predation of zombies is better to release the Z-type enzymes in the body. Whenever a staff member is present in the subject's presence, the subject will secrete a large amount of saliva containing the Z-type enzyme and enter a violent aggressive state, which is rarely the case when the subject is left alone.

Regarding the research on the evolution of zombies, thanks to the corpses of the smasher brought back by the Tiger Squad, Mei Qiu was able to compare ordinary zombies with evolved zombies. The results showed that the Z-type enzyme in the Shredder was indistinguishable from that of a normal zombie, but the DNA structure between the two was very different.

The shredder's DNA chain has more genomes, and these gene sequences seem to come from different individuals, which is impossible in a normal person's body, and the only explanation is that the shredder obtained these gene fragments through other means.

To verify this observation, Mei Qiu made a bold attempt: feeding. After a zombie bites a human, the human blood and muscle tissue will enter the zombie's body through the digestive tract, and this is likely to be the way the zombies acquire other genetic fragments.

Mei Qiu dripped her own blood into the subject's mouth to see if the zombie actually evolved by obtaining the gene fragment in this way.

It's a pity that Mei Qiu's experiment has not made much progress, and the DNA in the cells of the experimental body has indeed obtained new gene fragments, but I don't know if it is because the time is too short or the genetic material obtained is too small, but there is no change in the experimental subject on the surface, which is very different from the previous expected result - evolution.

And Zhao Qiang, as the only individual who did not become a zombie after being attacked by zombies, is also the focus of Mei Qiu's research. In the battle of Yuelu Mountain, Zhao Qiang was injured by the sharp teeth of the zombie rat, and then there was a very serious zombie phenomenon, unconscious, high fever did not go away, and his limbs twitched.

Just when everyone thought that they would lose Zhao Qiang, a miracle actually appeared, which greatly aroused Mei Qiu's interest. In her opinion, there must be some special antibody in Zhao Qiang's body to be able to resist the infection of Z-type enzymes, and as long as this substance is extracted to make a vaccine, people will usher in the dawn of victory.

After analyzing Zhao Qiang's blood, Mei Qiu found that not only Zhao Qiang, but also all the people in the base contained a special protease in their blood - N-type enzyme, whose molecular structure is extremely similar to that of Z-type enzymes, but its existence can neutralize the spread of Z-type enzymes in the human body.

Unfortunately, the activity of N-type enzymes is much lower than that of Z-type enzymes, and it has always been out of a weak position in the confrontation with Z-type enzymes, once a person is bitten by a zombie, a large amount of saliva containing Z-type enzymes enters the human body along the wound, and then everything is over.

Zhao Qiang was able to survive the zombie transformation, thanks to a large part of the zombie rat's attack method, under the action of centrifugal force, the saliva containing Z-type enzyme attached to the rodent that rotated and flew at high speed was thrown away, and only a very small part entered Zhao Qiang's body, which is why Zhao Qiang was spared.