16 years

In her previous life, Fu Yan ran around outside—rescuing, searching for things, investigating suspicious places, conducting advance inspections of investigation sites, and so on.

In this life, Colonel Fu was trapped in the base by an inspection report, and all these tasks fell on Shao Qiu.

Shao Qiu led the action team to run all over the world, and he would only come back once in a few months.The relationship between him and Fang Sining is still lukewarm, but he will come to have a meal with him after returning to the base.

Liu Ruosong watched from the sidelines, and always felt that the two of them had an inexplicable subtle understanding—the kind that could be published in the gossip tabloids.

However, Liu Ruosong didn't have much time to read other people's gossip. In the early stage of the research, Fu Yan could go out every five days and two days. Straight up.

Not to mention strolling around the base, the experimental building would like to treat him like a fragile piece of porcelain, wrap it in a crash pad and put it in a central air-conditioned room with constant temperature, and don't come out even a step.

Liu Ruosong was worried that he would be too bored as if he was in prison, so he spent most of his time at work, just wanting to solve the problem early and feel at ease sooner.

The field team who were investigating outside had no news, so Fang Sining could only ponder over and study the materials left by Shao Xuefan, and follow his previous research ideas.

He reproduced a small piece of cultivation base in the experimental area, and used the previous sample as a seed to reproduce a small piece of fresh virus petri dish.

The experimental team successively extracted Fu Yan's blood for analysis, and found a genome that was relatively similar to the B-92 strain.This genome comes from a homologous biological gene, and it is still unclear how it was produced.

It is precisely because of this set of genomes that Fu Yan's genes can fuse and co-exist with B-92 to a certain extent. Fang Sining tried to use Fu Yan's blood as a substrate to cultivate the virus, and found that under the simulated human condition, B-92 [-] will have a special mutation reaction with Fu Yan's blood.

However, this kind of mutation reaction is very slight, and it cannot change the original genome of the human body to achieve a complete mutation at the level of "zombification".

Fang Sining tried to extract this mutated virus, but failed most of the time.This virus is very delicate and can only be active in a petri dish that simulates the human environment. Once it leaves this environment, it will lose its activity in just a few hours.

What's more embarrassing is that this mutated virus also has high requirements for the cultivation environment. In addition to the necessary temperature and humidity, once the blood is stored for more than three days, even if it is placed in an extremely low temperature storage box, the cultivation effect will not be good. Will be greatly discounted.

For this reason, Fu Yan had to provide a large number of "bases" for the experimental group to use.

After Fang Sining's attempt to extract the virus failed, the experimental group fell into a long period of bottlenecks. Later, Fang Sining inadvertently thought of another gray operation, and slowly began to make progress in the second stage.

——He chose an infected volunteer with the same blood type as Fu Yan, and transfused a bag of blood with B-92 virus to him.

This was originally a helpless move, but in the follow-up medical monitoring, it was found that the mutation rate of the blood transfusion had dropped significantly, and it took three full days to completely zombify.

When this incident was first discovered, all members of the experimental team were overjoyed, but Fang Sining and Liu Ruosong discussed it, and they both felt that in order to avoid special cases, more evidence should be found.

But this is obviously not easy, after all, there is only one source of the "special medicine", and the experimental group dare not take time away from Fu Yan no matter how anxious they are—not to mention there is Liu Ruosong, who seems to be silent, but in fact is like an intermediary. As the supervision nail of the experimental group, the experimental group has to think twice about making decisions.

What's more, infected volunteers with the same blood type as Fu Yan are hard to come by. The general headquarters once passed a message to the laboratory building, saying that qualified volunteers could be selected to form a "death squad", but Fang Sining refused.

"It's not yet that time." Fang Sining said: "We work hard to live one more life. It's not yet time to blow up the bunker, so there is no need to sacrifice in vain."

"And Captain Fu alone can't provide too many volunteers." After hanging up the phone, Fang Sining shrugged at Liu Ruosong and said helplessly, "A bag of blood is 200cc. Once there are more than three people, the load will be too great."

After all, there was only one Fu Yan, and the experimental team was afraid that something would happen to him, and the living gene bank would be gone afterwards.

So the experimental group spent a full eight months to determine the role and regularity of the mutated virus—as they had seen before, the mutation period of all volunteers after blood transfusion had been extended to a certain extent, among them female, middle-aged The prolongation effect was most pronounced in children and children.

The mutation incubation period of a girl who was rescued from the urban area was even extended to a whole week.

This modified virus, which originated from Shao Xuefan and parasitized in Fu Yan's blood, finally proved in experiments that it could not be an effective drug to treat mutations, but it became a specific drug to delay the disease.

This is an effective research progress, but Liu Ruosong is inexplicably unhappy.

"You should be happy." Fang Sining said, "If the problem can be solved to this extent, it will be a blessing for him."

"I know." Liu Ruosong looked up at the ceiling subconsciously, and said in a low voice, "Don't worry, even if it's for him, I have to do my best."

In the following months, they conducted a detailed data study on these volunteers who had undergone blood transfusions.

After the mutated virus entered their bodies, their blood circulation system accepted part of the mutated virus through Fu Yan's "base".

But it is a pity that this mutated virus also coexists with the zombie virus. They cannot stop the survival of the zombie virus, and they are not strong enough. They are at a disadvantage in reproduction and development, and will be covered soon.

This is also the main reason why the "specific medicine" can only delay, but cannot prevent the mutation.

In the final analysis, the virus they cultivated was not mature enough, it was just a semi-finished product that could not survive on its own. If they did not rely on Fu Yan's genes, they would not even be able to survive.

So the experimental group had to turn their minds on Fu Yan again.

In the second year of Fu Yan's living in the laboratory building, the experimental team successively took blood samples, cell samples and two body fluid samples from him.

The experimental group successively conducted multi-angle control experiments under the condition of controlling variables, and found that the virus culture in different samples does have certain deviations.

So in winter, Fu Yan even had two puncture operations.

"……how do you feel?"

Liu Ruosong carefully supported Fu Yanping to lie down, took off his pillow, and helped him adjust his posture.

There was a thin layer of sweat on Fu Yan's forehead, and his brows were unconsciously frowned, but his tone was still steady, and nothing could be heard.

"It's okay." Fu Yan said, "There are anesthetics."

"What's the use of infiltration anesthesia." Liu Ruosong took a bottle of sugar water from the cart beside the bed, inserted a straw and handed it to his mouth, and said in a low voice, "There's no anesthesia in the bones, it should hurt It hurts just as much."

Fu Yan took a sip of water, then smiled at him.

"I thought it was you who came to fight." Fu Yan said.

"I'm a biochemical student, not a medical student." Liu Ruosong said, "How dare I do this kind of precise operation—let alone hit you."

Fu Yan saw his distress, so he squeezed Liu Ruosong's hand.

Liu Ruosong sat on the edge of the bed, twisted his body, put his hands on both sides of Fu Yan's head, leaned down and kissed Fu Yan.

Fu Yan's moist lips were stained with the sweetness of sugar water, Liu Ruosong took a bite, and subconsciously licked his lips.

"You've lost weight." Fu Yan said.

"You're just ignoring the facts and beating back." Liu Ruosong said, gently leaning against his shoulder: "Don't move, you have to lie flat for four hours."

As Liu Ruosong spoke, he straightened up, wiped Fu Yan's sweaty forehead hair, and then continued: "There is news about the person sent by No. [-] to look for the 'petri dish'."

Fu Yanren couldn't go out in the laboratory building, and Liu Ruosong had to bring him in all the news from outside.

The "Petri dish" project has been implemented outside for more than two years, and the fox's tail has not been caught. After a long time, even Zhao Jincheng doubted whether the clues left by Yang Yuqing were true.

But now that Liu Ruosong brought it up on his own initiative, it means that this matter has finally made progress.

"The second team encountered a suspected person along the northeast line." Liu Ruosong said, "It's just that they didn't catch them, and they ran away."

"...Character?" Fu Yan repeated in a low voice.

"According to the second team, it's a woman." Liu Ruosong said: "The woman is very strange, she seems to be a zombie, but it doesn't seem to be - she is chained and caged, wearing a restraint suit, she is very manic and aggressive It’s also very strong. But she looks different from those rotting zombies outside, her body is complete, her body is bluish-white but not rotten, according to people from the second team, she seems to still have a certain degree of consciousness, but maybe not much.”

"Where did you see it?" Fu Yan asked.

"I didn't hear the exact coordinates. It's a small border town with a corner." Liu Ruosong knew that he was thinking about it, and told all he knew before asking: "The second team was investigating. After two days of investigation, the result was the third day. When I was in the city, I found that there were people acting strangely in the city. I thought they were survivors who hadn’t gone to the concentration area, but they followed up and saw that they were evacuating just in time for the research site—there were two large helicopters, and I don’t know where they were hiding before. of."

From the apocalypse to the present, a large concentrated network of survivors has been radiated out based on large military regions and military bases.The survivors quit their supremacy in the food chain, regrouped in shelters everywhere, and temporarily surrendered the city.

"The second team didn't expect to hide a plane under their noses, and they didn't have hard goods in their hands, so they had to run away." Liu Ruosong himself felt incredible, and muttered: "It's been almost three years since the end of the world, where did they come from?" plane—from an interdimensional pocket?"

"What is it for more than two years, who hasn't ordered the inventory yet." Fu Yan smiled lowly, and said softly: "Believe it or not, in the past two years, even the fighter planes covered with plastic sheets in area B behind, there are still people Do regular maintenance."

Liu Ruosong thought about it, but it was the same reason.

"But the discovery of the second team is equivalent to proving that Professor Yang's point of view is correct - the 'petri dish' produced by the zombie virus is a living person, and they transform the virus that cannot act on the human body through another special person to extract An effective virus weapon has been released." Liu Ruosong paused, and his voice sank: "Brother, I have a bad feeling."

Fang Sining's research did not make a breakthrough, and the second team brought back this news——

"I'm afraid they will repeat their thinking." Liu Ruosong said in a low voice, "...I want to try this with you too."