These two messengers first came to the northwest camp to visit the general Ning Zhiyuan, and while explaining to him the intention of coming, they also showed the emperor's holy decree.

After Ning Zhiyuan respectfully accepted the holy decree, he immediately took them to the camp where Chi Fei was.

After the group arrived at the camp, Chi Fei was idle and bored and hid in the barracks to write.

He has been idle for most of the past half a month, and he has written more than 100,000 words, just to pass the time.

When he heard that his father-in-law was coming, he hurried out to greet him.

After seeing his little son-in-law, Ning Zhiyuan introduced: "Ah Zhen, these two are Lord Qincha sent by the emperor, this is Lord Zhao, a bachelor of the Hanlin Academy, and this is Lord Xu of the Ministry of War.

The two adults, this is my little son-in-law Su Zhen, who is also the one who has studied the method that can prevent people from dispersing sores. ”

Chi Fei didn't expect his father-in-law to introduce himself so directly, so he could only salute the two Qincha while suppressing his surprised thoughts, "Grass people Su Zhen, the two adults are good." ”

"What, it was the little son-in-law of the Great General who came up with this method?!" Zhao Tianzheng and Xu Jiahua suddenly showed extremely shocked expressions.

At first, they thought they were going to meet an old Taoist who wore a Taoist robe and claimed to have all kinds of supernatural powers.

Because they, like most officials, feel that Zhen Guogong may have been deceived by some charlatan.

But they never expected that the other party would be the little son-in-law of Zhen Guogong.

Regarding the little son-in-law of Zhen Guogong, they also know some details.

Although this Su is really a civilian, the other party is the owner of the literary newspaper and the famous popular author Chi Fei.

The dispute between him and King Fu back then can be said to have made the whole capital watch a good show, and it is still vivid.

If a famous person like Chi Fei really wants to deceive the world, it will be like lifting a stone to shoot himself in the foot.

No matter how you think about it, the other party shouldn't be so stupid.

Is this true?

The two couldn't help but look at the polite Chi Fei with doubt.

"General, why didn't you make it clear in your letter that the person who discovered this method was your son-in-law?" Zhao Tianzheng, a scholar of Hanlin Academy, couldn't help but ask.

Ning Zhiyuan said with a smile: "Isn't the matter still clear?" If I say it rashly, if something goes wrong, won't my little son-in-law be burdened with infamy through the ages?

Besides, I have already made it clear in my letter that I have only verified it on forty death row inmates, and I wonder if anyone else will be equally effective. Otherwise, the Holy Lord would not have sent two adults to investigate this matter, and the two of them said right? ”

The two Qincha couldn't help but be a little speechless, it was the first time they had seen an old man who protected his son-in-law like this.

However, they were ordered to investigate the matter, and regardless of who came up with the idea, the most important thing was to confirm whether it was true or not.

Next, Chi Fei took them to inspect the situation of the 40 death row inmates, and explained to them along the way when these people were vaccinated, when they had been infected and what the situation was like now.

Except for not saying that the raw material for inoculation was cowpox, everything else was explained to the two Qincha as much as possible.

Finally, Xu Jiahua couldn't help but ask: "Brother Su, you haven't told us yet, what do you mean by so-called vaccination?" ”

Chi Fei knew that the matter was very important, so he didn't answer immediately, but looked at his father-in-law, Ning Zhiyuan, and waited for his instructions.

Ning Zhiyuan interjected: "Two adults, it's not my son-in-law who has the intention to hide it, because this inoculation method is the real secret that can prevent people from dispersing sores."

Without the permission of the Holy One, don't talk about my son-in-law, even I don't dare to spread it easily, please forgive me. ”

Xu Jiahua was suddenly speechless.

Zhao Tianzheng, a bachelor of Hanlin Academy, sneered in his heart: The prince of Zhenguo still wants to use this method to receive merit from the imperial court, but this reckless man actually directly asked people about the secret recipe that they have worked so hard to research, and it is strange that people are willing to tell you.

Unlike Xu Jiahua, Zhao Tianzheng had made careful preparations before coming.

Zhao Tianzheng asked meaningfully: "Brother Su, I once asked a doctor with excellent medical skills, and he said that anyone who has been cured of sores will generally not get this disease again in the future." I wonder if Brother Su knows about this? ”

After speaking, he stared at Chi Fei without blinking to see how he reacted.

As long as Chi Fei showed a panicked expression, Zhao Tianzheng could immediately conclude that the other party had taken advantage of this loophole to deceive.

It was the first time Xu Jiahua had heard of this kind of thing, and while he was surprised, he quickly understood why Zhao Tianzheng said this, and immediately looked at Chi Fei and waited for him to answer.

However, Chi Fei's attitude was very calm, and he explained unhurriedly: "The grass people know about this matter. People who have had sores will not suffer from this disease again in the future.

But anyone like this will most likely leave a very obvious acne scar on their face, which is commonly known as pockmarked face. ”

Zhao Tianzheng nodded and said, "That doctor did tell the lower officials that most of the people who have been dissipated and healed will have quite obvious acne marks on their faces. ”

"The two adults have just met those death row inmates, have you ever seen any of them have obvious acne marks on their faces? From this it can be seen that they have not had sores that have been scattered. ”

Zhao Tianzheng frowned and said, "I admit that Brother Su has a point, but these death row inmates look no different from ordinary people, and we really don't know how to tell if they really won't get sores." I wonder if Brother Su has a way to prove this? ”

Chi Fei replied: "There is a way to prove it, and that is to do a comparative experiment." ”

"Comparative experiments? What does that mean? ”

"It's very simple, we can first find a few death row inmates who have never had sores, and then select 10 more people from the death row inmates who have been vaccinated, and then drip the pus from the sores on the wounds of these two groups of people, and finally observe whether these two groups of people will be infected with sores.

After doing so, if the condemned prisoner who has not been vaccinated is infected with the sores, it means that the pus on the body of the sores patients will indeed infect people, which is the premise.

In the same way, if the vaccinated death row prisoner did not have the sore, it means that they have developed the ability to resist the sore.

I wonder if the two adults think this verification method is appropriate? ”

The two Qincha thought for a moment, and finally nodded together in agreement.

This is indeed the most intuitive way to verify this.

In fact, this is the last experiment that Chi Fei wants to do, using the most extreme method to prove whether cowpox is really immune to the smallpox virus.

Because previous infection experiments have only proved that people who have been vaccinated with cowpox can indeed resist pus infection in smallpox patients.

But the question is, can pus from smallpox patients really cause smallpox?

Although Chi Fei is 90% sure that the pus from smallpox patients can infect people with smallpox, there is still a 10% uncertainty if it is not tested.

In order to completely dispel this doubt, Chi Fei can only do this extreme experiment to make the most thorough verification of the effect of cowpox.

He knew very well in his heart that once this method was popularized throughout the Northwest and even the entire Great Wei, the slightest mistake could lead to the death of thousands of people.

He couldn't afford it, so he had to make sure it was foolproof.

Even if this time it will really cost him a few lives.

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