Qin Yalan had mentioned this to Tian An before, so she probably knew why Doctor Qin came to see her.
After tea was served and a few pleasantries were exchanged, Tian An, seeing that he was too embarrassed to speak, took the initiative to say, "Grandpa Qin came here for the prescription for smallpox!"
When it comes to matters related to medicine, Doctor Qin immediately becomes serious, as if he has become a different person.
He immediately took out a small notebook from his lapel and asked in a serious tone. He didn't seem embarrassed at all!
Perhaps because he was old and afraid that he could not remember, Doctor Qin asked questions, and after getting Tian An's answers, he took out pen and ink and began to record.
Seeing that he was taking notes, Tian An also slowed down his speech so that he could keep up. But he was old, his hands were a little stiff, and he couldn't write fast with a brush, so he started to get anxious as he took notes.
Seeing this, Tian An subconsciously took out a pen from his bag and gave it to him, "Grandpa Qin, try this!"
Doctor Qin looked at the pen in front of him, stunned for a moment, and asked uncertainly: "Is this a pen?"
Tian An nodded, then unscrewed the pen cap and took a piece of paper beside him to demonstrate. "This pen is called an ink pen. It has ink stored in it, so you don't have to dip it in ink all the time. The tip of the pen is also thin and hard, so you can write beautiful characters without having to move the pen deliberately. The characters you write can be large or small, making it perfect for taking notes."
Doctor Qin took the pen and tried it on some waste paper. It was just as Tian An said. It was very convenient because he didn't have to dip the pen in ink all the time.
Tian An specially helped him adjust the way he held the pen. After he wrote a few lines, he became more and more proficient, and his speed was much faster than before. Moreover, he could write smaller words with this pen, and he could write a lot more words on one page of his booklet.
Doctor Qin became more and more proficient in the technique, and his note-taking speed could even keep up with Tian An's speaking speed.
"An An! You said in the booklet recording smallpox that smallpox treatment is only the symptom, and prevention is the root cause. What does that mean? Can this disease be prevented? How do we know who will be infected with this disease and when?" Doctor Qin frowned. This was also what he was most curious about.
Tian An shook his head. "No, it's not possible. Smallpox has a long incubation period. Even in the early stages of the disease, it's very difficult to diagnose. I'm not a fortune teller, so how can I predict everything?"
"That?"
Tian An smiled and said, "What I mean by prevention is not to predict whether a person will get sick and then treat them in advance, but to give healthy people the smallpox vaccine in advance."
Doctor Qin frowned even deeper. "This is the first time I've heard the word vaccine. Can An An explain it more clearly?"
Tian An nodded and said, "To put it simply, the smallpox vaccine is the smallpox virus itself, but we need to artificially reduce its toxicity or inactivate it.
That is, they reduce its toxicity and keep it dormant, then inject it into the human body, allowing it to remain dormant for a long time without causing any harm. It is equivalent to being assimilated by the human body and becoming a part of it.
After thinking for a while, he said, "It's like asking the enemy to surrender, so that they can fight for us. When the real virus invades our body, the vaccine we injected into our body beforehand will protect our body from the interference of the external virus.
This method is not only applicable to smallpox, but many other diseases can be prevented in the same way."
Doctor Qin was so stunned after hearing Tian An's explanation that he even forgot to take notes. This was truly shocking; he had never dreamed that this was what Tian An meant by the vaccine.
Isn't this just fighting poison with poison? No, it's even more advanced because vaccines use the virus itself. Fighting poison with poison requires finding other remedies and testing them, and while it kills one thousand enemies, it also injures eight hundred of your own, is extremely damaging to the body. It can only treat, not prevent.
But vaccines not only prevent disease, they also don't harm the body, and people don't have to suffer from the pain of illness. It's a perfect combination of benefits and no downsides! But can this method really work?
Doctor Qin raised his doubts nervously.
Tian An was not annoyed. He asked someone to call Deng Xue over and immediately asked her to show her arms.
Doctor Qin saw Deng Xue rolling up her sleeves and turned his face away awkwardly, "An An, this..."
Tian An slapped his forehead, forgetting about the strict rules between men and women.
I had to use a handkerchief to cover the rest of Deng Xue's arm, leaving only the vaccination site exposed.
"Grandpa Qin, I had already vaccinated Deng Xue before she entered the Anguo Mansion. I've personally tested it and it's effective. She spent more than a month in the An Mansion interacting with smallpox patients all day without contracting smallpox."
When Doctor Qin heard this, his eyes lit up. He turned his head and looked at Deng Xue's arm, and sure enough, he saw a small mark there.
Tian An did not hide his secrets and told him the method of making the vaccine, hoping that he would report it so that the country could provide funds to vaccinate the people.
Doctor Qin was even more excited than her. Countless people died and were injured every year due to smallpox. If vaccination could be popularized, many lives could be saved!
Doctor Qin could no longer sit still. After hurriedly saying goodbye to Tian An, he even forgot about his granddaughter and went straight into the palace.
Qin Yalan looked at Tian An helplessly and said, "My grandfather is a medical idiot. He can't control himself when he encounters something like this. I'm sorry to have embarrassed you."
Tian An said, "Grandpa Qin is a kind-hearted man."
In the palace, the director of the Imperial Hospital was personally taking Doctor Qin to the Imperial Study to meet the Emperor.
The emperor guessed that they came because of smallpox, so he immediately asked Defu to summon them.
Doctor Qin told the emperor about the vaccine. The emperor was very pleased and shouted, "God bless me, Tian Ling."
When he learned that the vaccine was proposed by Tian An, he frowned and said, "Why does this girl say half and half?" He clearly remembered that the last time he looked through the smallpox record manual, there was no mention of the vaccine.
Doctor Qin was terrified, fearing that he might harm Tian An. He knelt down and explained, "The Lord of Anping had actually mentioned this, but this idea is difficult for most people to accept, and it's difficult to explain clearly in words alone. It can only be explained in person."
I think even if I don't go to her, she will come to us to talk about this after a while."
Of course, the emperor would not blame Tian An for this matter. What worried him was that the national treasury was empty and it was difficult to come up with money to popularize vaccines across the country.
Thinking of this, I thought of Liulichang. What are the people in the Ministry of Industry doing? This speed is too slow!
The Minister of Works, who was supervising the work, sneezed for no apparent reason. Huh? Who was scolding him?
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