She married a dying prince and she won three babies.

Chapter 222: Vaccination

The cow stepped on a piece of loose soil and its front hoof slipped, causing Princess Lingxuan to dodge and slide straight off the cow's back.

Just as the joy was about to turn into sorrow, Chunlei reacted very quickly. He took a step to the side, grabbed Princess Lingxuan's feet, and pushed her back steadily onto the ox's back.

She was so scared that she pounded her chest.

"Oh, that was a close call. Chunlei, when we get back later, this princess will reward you with ten taels of silver."

"Thank you for the reward, Princess." Chunlei accepted it generously.

He also saved some money to marry a wife.

This is the sentence that the eldest young lady likes to say to him every time she rewards him.

After playing for an entire afternoon, both women had a lot of fun.

Yu Yuanzheng also did not forget her children.

We also asked a few guards to carry the children onto the back of the cow so that they could experience the feeling of riding a cow.

Alone Better Together.

The spectator Shangguan Ziqi kept smiling throughout the afternoon.

Seeing his wife and children having so much fun, his heart was filled with happiness and peace.

These are his wife and children whom he will protect for the rest of his life.

After returning to the farm, Shangguan Ziqi asked Qingfeng to call Yang Zhuangtou.

Then Yu Yuanzheng described what the cow she was looking for looked like.

"Don't worry, Madam Young Master. I promise to find it for you." Yang Zhuangtou was honored to accept this task.

The next day he personally visited several surrounding villages.

The farms around here are all owned by the noble families in Beijing, and they raise a lot of cattle.

That day he led two cows back to the farm.

When Yu Yuanzheng heard the news that Yang Zhuangtou had returned, she immediately ran to see the two cows he had brought.

"Uncle Yang, you're amazing! You found two cows in just one day. They're exactly what I need. Did you buy them or borrow them?"

"Madam, I bought it." Yang Zhuangtou answered respectfully.

"Yes, yes, these two cows are kept on the farm."

These two cows happened to be cows that had just milked calves and were most susceptible to cowpox.

Having cowpox is equivalent to having a vaccine.

The next day, Yu Yuanzheng planned to start the experiment.

Everyone argued for a long time about who would be the first experimenter.

"Madam, please use me as an experiment." Shangguan Ziqi was the first to sign up.

"Madam, let me go first." Qingfeng and Mingyue requested at the same time.

How could the eldest son be allowed to come first? What do these subordinates do for a living?

If anything happens to the eldest son, they will be held responsible.

"Zheng'er, how about I go first?" Princess Jing was actually the first woman to sign up.

She had asked Yu Yuanzheng for treatment before and knew her medical skills, so she felt very relieved.

Princess Lingxuan was baffled, and until now she didn't know that the miracle doctor was Yu Yuanzheng.

"Mother, what are you doing?" Princess Lingxuan asked curiously.

"Hey, your sister-in-law Yuan Zheng got a secret recipe. She can prevent smallpox by vaccinating us. She wants someone to test it first." Princess Jing explained.

"Really? I'll do it, I'll do it." Princess Lingxuan requested actively after hearing this.

Everyone was fighting over it, and Yu Yuanzheng found it very funny.

"Okay, everyone stop fighting and let my husband go first. Don't worry, I am still confident. After he tests it, I will plant it on each of you." Yu Yuanzheng made the decision directly.

After confirming the personnel, Yu Yuanzheng started to work.

Have a few guards control a cow and prevent it from moving.

Make a small incision directly on the cowpox under the cow's stomach and squeeze out the pus inside.

Dip a homemade cotton swab in it, draw a small wound on Shangguan Ziqi's arm, and apply the pus. It's that simple.

Four days later, Shangguan Ziqi developed a low fever.

The small wound on my shoulder became red and swollen.

Another day later, I started to have a high fever.

Yu Yuanzheng estimated it to be 38 to 39 degrees.

It's not particularly serious.

After another three days, the fever gradually subsided.

Some small rashes and blisters appeared on her body. Yu Yuanzhen applied some medicine and they disappeared in a few days.

During the entire process, Yu Yuanzheng prevented Shangguan Ziqi from contacting anyone and isolated him in a room.

And she herself was fully armed.

Try your best to avoid being infected.

In less than half a month, Shangguan Ziqi returned to normal.

Everyone was watching his reaction all the time.

This is smallpox, and no one is not afraid.

When he first developed the rash, the princess was very worried.

It looks very similar to the smallpox that people describe.

I was so worried that I couldn't sleep at night.

Her daughter-in-law tried to comfort her many times, saying that nothing would happen, but she still couldn't let go of her worries.

It wasn't until Shangguan Ziqi gradually got better that she felt relieved.

Throughout the whole process, Yu Yuanzheng carefully recorded his every reaction.

She felt like something might have gone wrong.

It shouldn't be this serious.

Most people would just have a low fever and recover after a couple of days of rest, but he had a high fever.

My husband has a good physique and should have a strong resistance.

After much thought, the only issue is dosage.

She was only focused on smearing pus on the wound without controlling the amount.

With this lesson in mind, she will now pay attention to the quantity.

"Okay, I officially announce that from now on, you will never be infected with smallpox again in your life." Yu Yuanzheng happily announced to everyone.

"Sister-in-law Yuan Zheng, is that true?" Princess Lingxuan was a little bit incredulous.

"Of course it's true, but it's not 100%. If the smallpox virus mutates, it won't be effective."

Yu Yuanzheng didn't say anything very confidently. Who knows if the smallpox virus will mutate?

"Ah, what is mutation?" Lingxuan didn't understand.

"Mutation. The internal structure of the smallpox virus has changed. It's like a person changing from a man to a woman. That's the biggest mutation."

"Oh." Princess Lingxuan still had a confused expression. How could a man turn into a woman?

"Okay, my husband's vaccination was successful. Now it's our turn. Everyone needs to be vaccinated." Yu Yuanzheng announced.

"Sister-in-law Yuan Zheng, I'll go first." Princess Lingxuan was the most active.

Yu Yuanzheng did not use the children as the second batch of test subjects first, but asked the guards to be the second batch of test subjects.

This time she controlled the dosage.

The guards only had a low-grade fever for three days, and then they were all full of energy again, without even a rash.

Next came the women, including herself and the maids and servants who served her.

Finally, there are a few children.

Ding Hui Niang also brought her son to be vaccinated, making a total of six children.

Yu Yuanzhen was still a little worried about vaccinating the children.

She prepared some medicine in advance so that she could control the severity of the disease if something went wrong.

Now that the adults have antibodies, she doesn’t have to take care of the children alone during the vaccination process, but everyone can take care of them together.

All six children had a small cut on their shoulder. The cut was very small. Except for the little princess who cried twice, the other children did not even cry.

Considering that children are much smaller than adults, Yu Yuanzheng is more strict in controlling the dosage.

As a result, all six children started to have fever the next day.

Ding Huiniang's son Yang Cheng only had a low fever. He was the oldest and might have better resistance.

The four children in the palace have slightly higher temperatures.

But the young master of Prince Jing's Mansion had a high fever.

Princess Jing and Princess Lingxuan were extremely anxious.

"Zheng'er, why do each child react differently?"

Princess Jing looked at the child's red face and felt extremely anxious, fearing that something might happen.