"Brother Shi, are you sure this thing can cure smallpox?" Xue Shao asked Zhang Zong, who was crawling under the cow's stomach and holding a small bottle to collect concentrated cowpox liquid. Of course he knew the name of smallpox, but he had never heard of the acne on cows that can cure smallpox.

"Ten thousand certainty, these cattle are all treasures. You and Yuanyi don't rush to let someone treat them. I will bear the losses. At worst, I can pay for you to buy new cattle!" Zhang Zong said excitedly. If possible, he even wanted to pull some cattle over and get them infected, so that they can collect more cowpox pus.

"Why don't you pay for it? If these cows can really cure smallpox, they might be worth a lot of money!" Xue Shao suddenly thought of a possibility and said excitedly at the moment.

"Then you may be disappointed. These cowpox can only be prevented after inoculation. If a person already has smallpox, this thing is useless." Zhang Zong took the time to explain. After saying that, he used a blade to cut the pus and squeezed out the pus inside and dripped it into the bottle. The cow felt the pain and wanted to avoid it, but was comforted by the person next to him.

Zhang Zong was busy for a long time, and finally finally collected all the cows, without even eating them. However, in the end, he only collected half a bottle of pus. After all, a cow could not collect a few drops.

After the collection was completed, it was already dark. Zhang Zong returned home happily with the bottle. Wan'er simply heated up the duck meat she brought back, and then asked Zhang Zong curiously: "Young Master, how to treat smallpox in this cowpox? Is it necessary to drink it? That's too disgusting!"

"Of course not. This thing only needs to be taken out a little, then scratched the person's skin, and then applied a little pus in the bottle to the wound. This kind of cowpox generally does not have any impact on people. At most, it will feel a little uncomfortable a few days ago, and then it will recover by itself. From then on, it will never be full of smallpox again." Zhang Zong explained with a smile.

"Huh? This method seems a bit familiar?" Wan'er couldn't help but look thoughtful when she heard Zhang Zong's words. Then she quickly went to the study room, then took the book from the bookshelf and spread it out in front of Zhang Zong, "Please read, is the method recorded in this book the same as what you said?"

"Prescription for treating warts in children: use needles and small knife to cut the eyes on all sides, making it seem like blood. Take the juice of the sores and make it pick up." Zhang Zong pointed Wan'er and read it out in a low voice, and his face also showed a surprised expression. Although the treatment symptoms were different, the principles of the method were the same.

"This book is..." Zhang Zong immediately turned the book curiously, but at first glance he saw the three big words "Qianjin Fang" written on the seal of the book, which surprised him, "It turned out to be the daughter of the Medicine King. I didn't expect that he had already summarized the method of vaccination!"

"The old doctor Sun used human pus, but the young master used cowpox, and the symptoms treated are different. Moreover, for terminal illnesses such as smallpox, it is estimated that the old doctor Sun had no good idea, so it seems that the young master is more powerful!" Wan'er also smiled again at this time. With Sun Simiao's daughter prescription, she was also more confident in Zhang Zong's method of growing cowpox.

After having supper, Zhang Zong immediately found a knife, then disinfected it with alcohol, then rolled up his sleeves and wanted to inoculate himself. At this time, Wan'er, who had just returned from the kitchen, was shocked when she saw him and hurriedly stepped forward and asked, "What are you going to do, young master?"

"I'll give myself a vaccination. I'll give you a try first. If nothing happens, I'll vaccinate you and Xue Shao and the others. In the future, even if smallpox explodes in the capital, there's no need to worry!" Zhang Zong raised his head and smiled.

"No, how can you take risks with your own life? What if there is something?" Wan'er immediately said anxiously when she heard Zhang Zong's words. Although Zhang Zong had just said that there was no danger in vaccination, she was afraid of everything, so Wan'er was very worried that Zhang Zong would use himself to do an experiment.

"It should be fine. Cowpox has little impact on people. Even if it is a little more serious, it will only have chickenpox or something." Zhang Zong thought about it and insisted again. After all, vaccination must be tested on people. He doesn't want to do experiments with others, so he has to go through it himself.

"That's not OK. How can the young master take risks? I don't think so. The young master will report this matter to the prince tomorrow, and then ask the prince to arrange a few death row prisoners. At that time, the young master can use these death row prisoners to vaccinate, and then observe the physical reaction of the death row prisoners. If there is no problem, it will not be too late to vaccinate yourself." Wan'er suggested again at this time.

"It makes sense!" Zhang Zong was stunned when he heard this, and then nodded in agreement. Although he believed that cowpox was not dangerous, he should not be too careless. After all, cowpox was taken from cows. God knows if there will be any other bacteria inside. If you are infected with other diseases, it would be bad.

"Young Master understands it. Don't take risks with your body in the future!" Wan'er breathed a sigh of relief when she saw Zhang Zong agreeing, then stepped forward and took away the knife and other tools in Zhang Zong's hand, and put down Zhang Zong's sleeves.

"Hehe, I don't think about this matter well, just do what Wan'er said!" Zhang Zong smiled embarrassedly at this time. Although death row prisoners are also humans, in this era, they have no human rights, and they can provide some help to the medical progress of mankind before their death, which can be regarded as their contribution to the world.

Now Zhang Zong put the bottle containing cowpox pus in the cellar. The temperature is low, which is equivalent to keeping fresh in the refrigerator. However, when sleeping, Zhang Zong suddenly thought that fresh pus is said to be highly toxic, so the risk of vaccinating vaccinated is higher. Therefore, when vaccinated in later generations, the vaccinated vaccination will be dried into powder. The toxicity of this vaccinated vaccination is much smaller, and the effect is the same.

Thinking of this, Zhang Zong got up again in the middle of the night, then poured out part of the pus in the bottle, dried it on the plate and made it into powder, and the other part was still stored in the bottle. Then a control experiment can be performed.

The next morning, Zhang Zong ate the breakfast prepared by Wan'er, and then told Wan'er not to move the cowpox they had dried by herself. Then he came to Furongyuan to ask for a meeting with Li Hong.

But what Zhang Zong didn't expect was that when he first entered the hall, Li Hong sat there with red eyes, and his expression on his face was a little gloomy. When he saw Zhang Zong, Li Hong also smiled bitterly and said, "The Wu brothers are dead!"
Chapter completed!