The matter was urgent. Li Xiu had just sent his family to Chang'an City, but had to leave the city again with Sun Simiao. Fang Xuanling was very efficient in his work. When Li Xiu and Sun Simiao left the city, he had already selected a place to test the effect of cowpox in the south of the city. It was located in a military camp in the south of the city. It was not very far from Qingtian County where the ceiling erupted, and there were several mountains separated by the middle. As long as the mountain roads that could be passed through, officers and soldiers were arranged to guard them to prevent patients in Qingtian County from escaping to Chang'an.

When Li Xiu and Sun Simiao came to the military camp, Fang Xuanling had already sent over a cow that had just been found to have cowpox. This was just the first one, and there would definitely be more in the future. There were ten death row prisoners standing on the school ground lined up.

"Mr. Concubine, time is in a hurry. I have someone found this cow from near Qingtian County. There is only one at the moment, but more can be found in the future!" Fang Xuanling saw Li Xiu coming, and then smiled and said. He was very curious about Li Xiu's method of growing cowpox. In addition, this matter is of great importance, so he came here in person.

"You are polite to Fang Xiang. I thought I would have to wait for two days, but I didn't expect you to get things done in such a short time!" Li Xiu said in admiration at this time. Fang Xuanling is worthy of being a person known as the "Sage Prime Minister of the Eternal Eternals". The efficiency alone is not comparable to ordinary people.

"This time, smallpox is coming in full force. Although Your Majesty blocked the border of Qingtian County at the first time, a county town is not small, and no one knows whether anyone who has been in contact with a sick person has left Qingtian County before. So now Your Majesty and I are very worried that smallpox will spread. So if this method of growing cowpox is effective as soon as possible, it may save countless lives!"

When Fang Xuanling spoke at the end, he also showed a solemn expression on his face. If this method of growing cowpox was proven to be effective, then this would be another achievement that would last forever and affect the lives of countless people, so he had no choice but to ignore it.

"Mr. Concubine, I think it's time to start now!" At this moment, Sun Simiao couldn't wait to speak. He trusted Li Xiu more, especially after getting along this year, Li Xiu told him a lot of knowledge about human body, biology, etc., which made Sun Simiao have a deeper understanding of medicine and his medical skills were even more diligent before, so he was eager to know what's magical about this method of growing cowpox?

Seeing Sun Simiao's anxious look, Li Xiu couldn't help but laugh, and then he pulled Sun Simiao to the next to the cow. This was a cow, with fat, strong and bright fur, and it didn't look like a plowing cow. In fact, this should be a cow, of course it was not a black and white cow of later generations, but a grassland cow bought from the northern grasslands.

The nobles of the Tang Dynasty liked dairy products and ate the most goat milk products. Of course, some milk products were also some. However, the cattle were more expensive and were restricted by the court. Only a few nobles would raise cattle in other courtyards outside the city to produce milk. For example, Li Xiu raised two cattle specializing in milk production at home, mainly for the little girls like Qi Niang and Mian Niang.

"Please look at the prince consort. Some pus-flowing bumps have grown on the cow. I wonder if it is the cowpox you are looking for?" Fang Xuanling also walked over and said. He didn't know what cowpox looked like, so he could only ask someone to search according to Li Xiu's previous description.

Li Xiu actually didn't know cowpox, but he knew that cowpox was also caused by smallpox virus. Since the cow was found in Qingtian County, where smallpox was found, there should be no mistake. However, to be on the safe side, Li Xiu asked Sun Simiao next to him: "Master Sun, do you see if the bump on this cow's body is the same as the bump on a smallpox patient?"

Sun Simiao has rich experience in practicing medicine. In fact, he had encountered some smallpox patients before, so he saw him step forward and take a closer look. Sure enough, he found that there were many bumps in the lower abdomen of the cow, some of which had even become suppurated, and it looked a little nauseous.

"It is indeed very similar to the bumps on smallpox patients. Is this a cowpox?" Sun Simiao stroked his beard and observed for a while, and finally nodded, and then asked Li Xiu again. He didn't know what cowpox is, after all, he was not a veterinarian.

"That's right, this is cowpox!" Li Xiu said with great affirmation when he heard Sun Simiao's answer. After that, he asked someone to take a plate and a knife, and then someone to hold the cow so that he would not kick him. Then he stepped forward and picked out the pus from the cowpox with a knife and smeared it into the plate.

Although this cow is fat, it has limited cowpox, so it is only collected in the end. For these pus, it can be directly applied to human wounds to vaccinate. However, the toxicity of this is a bit high. The safest way is to dry the pus, which will have a rough inactivation process for smallpox virus, making its toxicity smaller and safer after vaccination.

However, Li Xiu didn't have this time now, so he took the plate and came directly to the death row prisoners. These death row prisoners were not stupid either. He just saw Li Xiu taking something from the bull, and now he walked in front of him again, which made them instinctively feel a little scared. Even if there were soldiers escorting around him, they tried their best to shrink back.

Li Xiu would not have any sympathy for these death row prisoners. In fact, there was almost no good thing about these death row prisoners, either murderers or thieves. Just from their vicious faces, you can see one or two.

So Li Xiu came directly to the first prisoner. The other party instinctively wanted to escape, but was pressed tightly by the soldiers, and he could not move at all. However, this aroused the other party's fierceness and opened his mouth to curse. However, he didn't expect that as soon as he cursed, the soldiers next to him came forward and kicked him a few times in the stomach. Now he immediately became honest.

Li Xiucai didn't know a death row prisoner. After seeing that the other party dared not resist, he smiled and last time, he directly cut a small cross-shaped wound on the other party's arm with the knife just now, and then applied the pus to the wound. As a result, the originally fierce death row prisoner was so scared that his whole body was trembling. He didn't dare to ask, not to mention how pitiful it was.

"Don't worry, this thing won't kill you, but it will cause you to have a minor illness for a few days, and it will be fine afterwards!" Li Xiu explained lightly. He was afraid that if he didn't explain, he would scare these prisoners to death, or get a mental breakdown, or something like that.

In the end, Li Xiu planted all ten death row prisoners with cowpox, and there were still some left on the plate. Now this thing is a treasure, so he did not waste it. He took it to a clean place to dry and could still be used in the future.

"Mr. Concubine, is this... that's enough?" Seeing that Li Xiu had finished his work, Fang Xuanling couldn't help but walk forward and asked. Although Li Xiu had already talked about the process of growing cowpox in the hall before, he still felt that it was a bit too simple. You must know that it is smallpox, known as one of the most terrible plagues. How could it be so simple that people can no longer get infected with smallpox?

"Haha~, if you are clumsy, the next thing is to wait until these prisoners recover from the disease, they can contact smallpox patients. Then the effect will be seen!" Seeing Fang Xuanling's somewhat suspicious expression, Li Xiu couldn't help laughing. It was really rare to be able to make Fang Xuanling, who has always been wise, show such an expression.

"Mr., will these prisoners be infected after they become ill, or will they become smallpox after they become ill?" At this moment, Sun Simiao also walked up and asked. He had heard Li Xiu say before that the cause of this kind of cowpox is the same as that of smallpox, so he was worried about what unpredictable changes would happen to these prisoners after they become ill?

"This... should not be contagious. Although the cause of vowel is the same as smallpox, there are still some differences. However, to be on the safe side, these prisoners are better in isolation and detention. Let's talk about it when they recover!" Li Xiu was also a little unsure. After all, he had never grown vowel in his previous life, but he had seen some elders with scars left by acne on their arms.

"Okay, since the symptoms of this kind of cowpox are mild when it occurs, I can also observe it carefully!" Sun Simiao nodded seriously when he heard this.

Hearing Li Xiu say this, Fang Xuanling immediately asked someone to imprison the prisoner in a tent, with a circle of fences erected around him, and soldiers were guarding him. Except for Sun Simiao and Li Xiu, others were strictly prohibited from contacting them.

In the next few days, Li Xiu stayed in this military camp, mainly observing the situation of the prisoners. As a result, in just a few days later, these ten prisoners also became ill one after another. However, what Li Xiu did not expect was that the so-called symptoms of the onset were much lighter than he thought. Eight of the ten prisoners had no major symptoms, but some rash acne appeared around the wound, and then suppurated and scarred.

The remaining two showed some minor symptoms. One of them had small rashes all over the body, but they came and went quickly. The other was more serious. Purple vitiligo grew all over the body, that is, purple spots. Sun Simiao explained that this was an internal bleeding, and it might cause death. The reason for this situation may be because the prisoner was weak. After all, this guy was imprisoned in prison for a long time, and Li Xiu had also seen the environment in the cell. If he lived there for a while, it would be strange if his body was not weak.

However, purpura may only die. In fact, its mortality rate is very low. In addition, the lives of those death row prisoners are generally relatively hard. As a result, the more serious prisoner also recovered his health. However, this reminded Li Xiu that growing cowpox still has certain risks, especially for the elderly, weak, women and children, eating acne requires caution.
Chapter completed!