"Zhengren Sun, calm down." Zhang Nan looked at Sun Simiao who was so excited that he said, "This old man is simply a doctor fool. Doctor fool is not scary. What's scary is that Sun Simiao is still a doctor fool who cares about the people of the world. So as long as he encounters something that can benefit the people, Sun Simiao will become very excited.

After Zhang Nan reminded her, Sun Simiao realized that she was a little out of character.

"Sorry, I was so excited to see this magical method for a while. I hope you don't want to be surprised by it." Sun Simiao said with a straight body.

"I'll talk about this pharmaceutical matter later. Sun Zhenren should take care of the prince first. I think the prince is not smallpox, but I can't be sure. Mr. Sun will take a look." Zhang Nan said.

"Yes, yes, that's right, Chengqian, let Zhenren Sun take your pulse quickly." Li Er was also anxious. After all, whether Li Chengqian had contracted a disease is of great importance.

Sun Simiao nodded and soon got to Li Chengqian's side to get a vein for Li Chengqian. After a while, Sun Simiao said: "Go back to Your Majesty, I think that the Crown Prince has not been infected with smallpox, it's just that I feel the cold occasionally."

As soon as Sun Simiao spoke, Li Er suddenly breathed a sigh of relief.

"Thank you very much for Mr. Sun. Since Chengqian has not been infected with smallpox, I will feel relieved." Li Erdao.

"Your Majesty, I have something to ask for." Sun Simiao ignored Comrade Li Er's thanks, but instead made a request.

"Mr. Sun, it's okay." Li Er knew that Li Chengqian had not been infected with smallpox, so he felt at ease in his stomach. Li Er naturally refused Sun Simiao's request.

"I hope to take Zhang Nan to the village where smallpox eruption is used to treat patients." Sun Simiao bowed to Li Er solemnly and said.

"What?!" It's not just Zhang Nan, but Li Er also didn't understand Sun Simiao's request very much.

"Minister Sun is not joking. Qingquan doesn't understand medical principles at all. How can this help Zhenren Sun treat patients?" Li Er asked.

"Your Majesty, if I was discussing elixirs and immortality at that time, I suspected that Qingquan knew medical skills, then when I saw the medicine that Qingquan took out to treat typhoid fever today, I would have believed that Qingquan's medical skills must be above me." Sun Simiao said excitedly.

"Hey, Master Sun, I really don't know how to do medical skills. Mr. Sun really misunderstood." Zhang Nan didn't know how to explain this antiviral particle potion to this stubborn old man now. After all, it was replaced from the system. And if Sun Simiao said he wanted medicine or some medical facilities, Zhang Nan could get it for Sun Simiao even if he lost money. But now Sun Simiao took him to treat the disease, and Zhang Nan had no choice.

Seeing Zhang Nan's appearance, Sun Simiao thought that Zhang Nan was unwilling to show her precious medical skills. Without hesitation, she knelt down in one go. The Tang Dynasty was not the Qing Dynasty, but did not promote kneeling rituals. Kneeling rituals was the highest etiquette. What's more, Sun Simiao's age was already considered a grandfather to Zhang Nan. This kneeling scared Zhang Nan.

"Zhengren Sun, what are you doing? Get up quickly, I can't take it." Zhang Nan said, pulling Sun Simiao up, but Sun Simiao remained unmoved. Instead, he said: "The old Taoist is not kneeling for himself, but the old Taoist is kneeling for those patients infected with smallpox in the village. Qingquan, the old Taoist knows that you have the ability to save the world. The old Taoist begs you to help those patients." Sun Simiao looked at Zhang Nan with sincerity.

"Zhengren Sun, I..." Zhang Nan really had no way to explain. Sun Simiao was a doctor's parents' heart, but he really knew nothing. He had only a system. Zhang Nan also checked information about smallpox. Although smallpox was the only infectious disease that was eliminated by humans in the world in later generations. However, being eliminated does not mean that it can be cured. Even in later generations, smallpox is still a strong infectious disease that can only be prevented and cannot be cured.

"Zhengren Sun, get up and talk first. I tell you that this smallpox is really beyond cure. Once it is infected, it will definitely die. There is no possibility of treatment. This disease can only be prevented and cannot be cured." Zhang Nan said this and paused, and suddenly remembered what came.

"My friend, are you talking about the possibility of preventing smallpox?" Sun Simiao stood up excitedly when he heard Zhang Nan say this.

Zhang Nan stopped pulling, waved his hand, showing a thoughtful look.

As a modern person who grew up in the new century, Zhang Nan has naturally been vaccinated with vaccinated pox vaccine. Vaccination against smallpox is also common sense for everyone. So can we also vaccinate the people who are not infected with the disease in the Tang Dynasty?

Zhang Nan felt that this method was feasible, so he immediately started searching for vaccination in the system, but soon, Zhang Nan gave up on this method to vaccinate the people of the Tang Dynasty. The reason was that the system vaccine was sold was too expensive.

But did you really give up like that? Zhang Nan was thinking in his heart, and soon Zhang Nan began to search for questions about vaccinated vaccines in the system. As Zhang Nan expected, Zhang Nan really found some of his mistakes.

Although the production and manufacturing of vaccines are simply something that cannot be accomplished in the current Tang Dynasty, Zhang Nan thought of a local method.

The vaccination vaccine is made of vaccinated virus. It cannot be vaccinated now, but it can be infected with viruses. Zhang Nan thought of it, and Zhang Nan himself just checked it in the system. If a person is infected with vaccinated virus, he will only have slight discomfort and develop resistance to vaccinated virus. Since vaccinated virus has the same antigenic properties as the smallpox virus that causes human smallpox disease, people can also obtain immunity against vaccinated virus at the same time after vaccinated vaccination.

Thinking of this, Zhang Nan was immediately excited. With this local method, even without vaccines, the people of the Tang Dynasty could still prevent smallpox.

"Qingquan? Qingquan? Zhenren Sun is asking you something." Li Er called Zhang Nan who was in a daze.

"Ah?" Zhang Nan was called out by Li Er, and Zhang Nan came back to his senses.

"Zhenren Sun asked you if there is really a way to prevent smallpox." Li Er repeated Sun Simiao's question.

"I'm going to hide this from Your Majesty. I have really thought of a method, and I think this method is feasible." Zhang Nan said.

"Oh? What method is it? Tell me quickly." Li Er was also excited, and Zhang Nan looked at Li Er. I said this, but you can't understand it. Li Er quickly understood the meaning of Zhang Nan's look, and immediately patted Zhang Nan's helmet again.
Chapter completed!