The Wu brothers were silenced, but the murderer committed suicide, which left Li Hong, Zhang Zong and Di Renjie helpless. After all, the line was broken so clean that there was no way to investigate.

"I don't believe he will never show off his strength!" In the end, Li Hong had to instruct Di Renjie. Although he knew that this matter was related to Ming Chongyan, there was no evidence, which made Li Hong very crazy.

"As for your order!" Di Renjie immediately agreed upon hearing this, and he was very annoyed, because since he met Ming Chongyan, he found that he had been in a passive position. This time he almost grabbed the clues, but he still watched the clues break, which made him very unconvinced.

Di Renjie was about to say goodbye and leave, but at this time, Zhang Zong thought about the reason why he came to see Li Hong, so he hurriedly called him and said, "Brother Di, I just happened to have something I might need your help!"

"Oh? What's the matter?" Di Renjie immediately stopped and asked when he heard this. Li Hong also looked at Zhang Zong in surprise.

"Your Highness and Brother Di must have heard of smallpox, right?" Zhang Zong smiled slightly and said.

When he heard the word "football", Li Hong was sitting there, but suddenly stood up, and his face immediately became anxious and asked, "What, is there somewhere else that has exploded in the ceiling?"

Li Hong was not so panicked, because every time smallpox appeared, the court almost had to spend a lot of manpower and material resources to prevent and control it, especially to block the epidemic area and strictly prohibit anyone from entering and leaving. In the blocked epidemic area, it can almost be said to be a purgatory on earth. Not only smallpox is rampant, but law and order are also gone. After the smallpox has passed, less than half of the people can survive.

"Your Highness misunderstood that there was no smallpox explosion. Instead, I am experimenting with a prevention method of smallpox, called Cowpox, and I need some people to verify it!" Zhang Zong explained with a smile.

"Growing vowel? What is vowel?" Li Hong was relieved when he heard Zhang Zong's words, and then asked in confusion.

"Vacpox is a disease that appears on cows. This disease is not serious. It only causes some pustules to appear on the abdomen of cows. The so-called breeding of cows means taking out the pus from these pustules, then cutting a small mouth on the skin, applying the pus to the wound, so that people are also infected with cowpox. However, this disease is very harmful to people and can be cured in just a few days. After recovery, you will never get a smallpox again!" Zhang Zong smiled and explained the method of growing cowpox.

"Huh? This... this method sounds so familiar?" Li Hong immediately slapped his forehead and showed a memory expression, because he always felt that he had heard the method Zhang Zong talked about.

"Your Highness has also read Doctor Sun's "Qianjin Fang"?" Zhang Zong immediately smiled when he heard this. Fortunately, Wan'er woke him up yesterday, otherwise he really wouldn't know that there would be records on the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the Bachelor of the

"A prescription for a thousand gold! It is a prescription for a thousand gold! It records a method of treating children's warts, which is very similar to yours!" Li Hong also slapped his brain when he heard this. He was weak since childhood. When Sun Simiao was still in the capital, he had diagnosed him. Although Li Hong did not cure Li Hong, it greatly relieved Li Hong's illness. Therefore, Li Hong was very grateful to Sun Simiao, and therefore read the "A prescription for a thousand gold" published by Sun Simiao.

"Your Highness is indeed knowledgeable. I have indeed improved this method of growing vowel pox by referring to the method in Qianjin Prescription. However, this time it was for the treatment of smallpox. In fact, although smallpox is terrible, many people have discovered that those who have smallpox and survive will never get smallpox again in their lives. Vowel and smallpox are actually the same disease, but its symptoms are very mild. As long as you have vowel, you will never get smallpox again in your life!" Zhang Zong explained again, true and false.

"So that's it, I probably understand what you mean!" Li Hong still has a lot of knowledge about medicine, otherwise he would not have read Qianjin Fang, so he could quickly understand Zhang Zong's explanation.

"You need people to verify the method of growing cowpox. Is there any danger?" Li Hong asked again at this time.

"Actually, as far as I know, the danger of growing cowpox is very small, but it is the first time to operate it, so I think I'd better be careful, so I want to ask Your Highness for a few death row prisoners to grow cowpox on them first. If there is no problem, it can be promoted to other people." Zhang Zong explained with a smile.

"No problem, Dr. Di, please arrange this matter. If there are not enough death row prisoners in the heavenly prison, you can raise them from other prisons and you can do as much as you want!" Li Hong immediately ordered Di Renjie.

"As for the order!" Di Renjie heard it very seriously just now, and immediately agreed. He was already working part-time in Dali Temple and was very familiar with Tianzhu. Now with Li Hong's order, it was very easy to ask some prisoners to cooperate with Zhang Zong.

"Then Brother Di and I will go together. This matter is not too late. If it works, it can be promoted by the court. At that time, smallpox will not be afraid!" Zhang Zong immediately said goodbye to Li Hong.

"Okay, smallpox is extremely harmful. I don't know how many people have died from smallpox since ancient times. If Zhang Zong, you can find a way to prevent it, it can be said that it is of great merit. So if you have any other needs, come to me!" Li Hong nodded immediately and said.

Zhang Zong nodded again, then said goodbye with Di Renjie and left. After leaving the hall, Di Renjie couldn't help but ask curiously: "Brother Zhang, are you really sure to cure the smallpox?"

"It is not to cure smallpox, but to prevent smallpox. If everyone is vaccinated with cowpox, smallpox will have nowhere to live. Maybe in a few generations, smallpox will become completely extinct in this world." Zhang Zong corrected with a smile.

Of course, Zhang Zong's words were actually a bit optimistic. After all, even if everyone in the Tang Dynasty was vaccinated with cowpox, smallpox could still survive in countries outside the Tang Dynasty. After all, this is a global plague. It is said that the extinction of Indians in later generations was related to smallpox.

Seeing Zhang Zong so confident, Di Renjie felt a little relieved. He accompanied Zhang Zong back home and took the cowpox pus. In addition, the dried cowpox powder that Zhang Zong had dried yesterday was also scraped down by him and put it in another bottle. Then he could do a control experiment. If the dry powder is less toxic and effective, it would be safer when inoculating.
Chapter completed!