After many arguments and arguments by many officials, Emperor Jing'an finally issued a holy decree to allow the promotion of vaccination in the northwest region, but it was limited to the northwest region.

The meaning of this makes people think about it a little carefully.

To put it mildly, the imperial court wants to make the people of the entire northwest region a white mouse.

Because the northwest is the main area where the sores and plague are outbreaking, if the inoculation method is really effective, then no one in the northwest should have sores from now on.

It was evident that the imperial court wanted to see the results for itself before it began to promote the law in other places.

As a general in the northwest, Ning Zhiyuan didn't care about these conspiracies, and after receiving the holy decree, he immediately decided to give priority to vaccinating the soldiers in the border area.

Because the border counties are the most plague-stricken areas, and the soldiers there are also the most susceptible to infection, so they must be immunized first.

Due to the large number of soldiers to be vaccinated, the inoculated cowpox was simply not enough, so Ning Zhiyuan immediately sent thousands of cavalry to secretly search for smallpox cattle throughout the northwest region. Once you find it, you will immediately buy it and pull it to the camp where Chi Fei is located to domesticate it uniformly.

In order to increase the number of smallpox cattle, Chi Fei began to study how to artificially infect healthy cattle with the smallpox virus and thus become smallpox cattle.

After this attempt, he found that it was not difficult.

He first selected a few healthy cows and then applied the pus from smallpox cows to the healthy cows by means of needles.

It didn't take long for most healthy cows to start showing symptoms of smallpox slowly. But a small number of cows have no symptoms at all, which makes Chi Fei puzzled.

Later, he thought about it for a long time, and thought that these cows might have had smallpox before, and after they recovered, they had already produced antibodies in their bodies, so they would have no symptoms. This should be the most plausible explanation.

If this assumption is correct, it is necessary to vaccinate as many people as possible before these smallpox cattle recover.

Otherwise, when all the smallpox cattle have recovered, there will be no pox to plant.

Chi Fei immediately wrote a letter to explain the situation to his father-in-law, and after Ning Zhiyuan received the letter, he also felt that it was not too late, so he immediately ordered all military doctors and civilian doctors to go to the camp to learn from Chi Fei how to inoculate people with cowpox.

After these military doctors and doctors learned it, they rushed to various places in the northwest with the cowpox liquid extracted by Chi Fei alone to inoculate all the soldiers and generals.

As for the larger number of ordinary civilians, we can only wait a little longer.

So in just a few days, a wave of military doctors and doctors came to the camp, and everyone came with great anticipation to learn how to vaccinate.

They were all healers, and they were full of curiosity about this miraculous method that could prevent sores from being dispersed, and they had long wanted to see what was going on.

In addition to not telling them what the raw materials for vaccination were, Chi Fei did not hide his secrets, and clearly demonstrated to these military doctors and doctors how to vaccinate, and explained many things to be paid attention to.

For example, the vaccinated person should be advised not to touch the wound and must wait for it to heal naturally, otherwise the wound may ulcerate.

For example, after each vaccination, the knife must be burned with fire for a while to remove the poison, and then the next person can be inoculated after it cools down.

After teaching, Chi Fei also deliberately asked them to vaccinate each other in a group of two.

This will allow them to be immune to smallpox as frontline workers, and will allow them to practice it themselves.

This method is really effective, these military doctors and doctors not only practiced it themselves, but also experienced the symptoms of sores, but it is much lighter than that of real sores patients.

Ten days later, they saw with their own eyes that the pustules near the wound began to gradually scab over and heal, and they couldn't help but exclaim.

For those whose wounds had already scabbed and healed, Chi Fei put the extracted pox liquid in a special bamboo tube, and then sealed and wrapped them so that they could rush to the destination as soon as possible to inoculate the local officers and soldiers, and the time should not exceed seven days.

In addition to vaccination, they also have to register the name, age, place of birth and other information of each vaccinated person in the book, and have the other party stamp their fingerprints next to the registration column as a record.

Chi Fei is to follow the registration process of modern vaccination, so that it is convenient to check later.

The advantage of this is that if a new smallpox patient appears in the future, as long as you check these registers, you can know whether the other person has been vaccinated with cowpox before, which can be said to be clear at a glance.

Soon, these military doctors and doctors rushed to various places with pox liquid one after another, and in the end, only the military doctor Lu Jing stayed alone.

The reason why Chi Fei wanted to leave Lu Jing alone was because he wanted to teach him the most crucial and important step, that is, how to extract the pox liquid and let him know what these pox liquid was.

It is impossible for Chi Fei to stay in the northwest to do this kind of thing, and after he leaves, someone must take over his work.

Since the extraction of pox fluid is the core secret of the entire vaccination program, it can only be passed on to trustworthy people.

After careful consideration, Ning Zhiyuan decided to let Lu Jing, who was honest and reliable, be the one who took over, so this is why today's secret is taught.

Lu Jing was shocked when he saw with his own eyes that the pox liquid used for inoculation actually came from a sick cow that had scattered sores.

"Sir, can the things of this cow be used on people as well?" Lu Jing asked in surprise.

"Generally, no, this is a special case.

To put it simply, cows, like people, will also get sores.

It's just that after cattle are infected with sores, they are not as serious as humans, and at most they will only produce herpes or local ulcers, and they will naturally heal after a long time.

Have you ever heard of the art of human pox? It is to get the pox pulp of the sore-dispersing patient to a healthy person, so that the person will not be able to dissipate the sores from now on. ”

"I have read this method in ancient books. However, it is said that this method is extremely ineffective, so it has long been unused. Could it be that this has something to do with this? ”

"In fact, the technique of human pox is similar to the principle of vaccinia.

It's just that the toxicity of human pox is much greater than that of cowpox, and the inoculator is equivalent to artificially infected with loose sores, and its symptoms are not milder than ordinary sores patients, so this method is not only useless but harmful.

Cowpox, on the other hand, has very low toxicity and will only cause symptoms such as pustules or low-grade fever at the site of inoculation, which will heal quickly.

And a person who has had cowpox is equivalent to having a mild sore.

You should know that anyone who has had sores will not get it again in the future.

Therefore, the person who has been vaccinated with cowpox will not have sores in the future, and the general principle is this. ”

Lu Jing admired convincingly, "Mr. is really talented, he can even think of such an ingenious method, which is really convincing." ”

Chi Fei shook his head and said, "I didn't come up with this method, it was also told to me by the overseas monk, I just restored it." ”

"Who is that monk who is sacred, and who knows so many miraculous things. I wonder if Mr. can tell me the monk's Dharma name? ”

Looking at his eyes full of anticipation, Chi Fei felt that this lie was getting bigger and bigger, and it was a little difficult to end.

In order to satisfy Lu Jing's wish, Chi Fei had no choice but to bite the bullet and say, "That monk's Dharma name is science." ”

"Master Kejiao? He is worthy of being a high-ranking monk, and even the Dharma name is different. Lu Jing nodded again and again.

Looking at his admiring look, Chi Fei felt that it was better not to break his illusions, as long as he was happy.

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