Liu Xu had expected Mu Lingxuan's anger, but she had no time to care about it at this moment.

The symptoms and pulse conditions of those "poisoned" soldiers gave her some ideas, but she found them hard to believe.

She took out the cases from the afternoon one by one for comparison, and did not forget to ask Xuan Er to have someone record the performance of these people after taking the medicine prescribed in the afternoon.

After checking all the cases, it was already the hour of Hai.

After a busy day, she felt unusually tired and went to bed after a quick wash.

Qiao Xin rested on the couch beside her.

Perhaps because he was always worried about the conditions of those soldiers, Liu Xu did not sleep well that night and woke up early in the morning.

Since Liu Xu had ordered yesterday that the people on the boat were not allowed to contact the outside world, breakfast was bought by the people from the Dark Guard Camp and put on a small boat and pulled back, along with some food and vegetables.

In other words, Liu Xu and his companions will not disembark again until an "antidote" is developed or there are measures to completely isolate the infection.

At noon, a carriage driven by Xuan Qi drove towards the river bank.

Mr. Meng in the car looked slightly excited.

There is actually a poison that the little girl cannot cure at the moment, and Mr. Meng is very excited.

However, when getting off the car, the old man looked worried again.

After receiving the notice, Liu Xu stood on the deck early. Seeing the old man coming, she felt moved but also a little worried.

"Grandpa Meng, this poison is a bit strange. I'm a little worried that the Hundred Poison Pills won't be able to resist it." Liu Xu shouted loudly towards the shore.

How could the old man not understand what she meant when he heard this? He snorted coldly and said to Xuan Qi, "Don't go up there, kid. Let your little genius doctor heal Xuan San and send him back here!"

Xuan Qi pursed his lips and said nothing.

The old man rolled his eyes at him, "Didn't you hear your young lady say that even the Hundred Poison Pills might not be able to resist that thing? Don't go up and cause trouble!"

Xuan Qi was stunned and looked at Mr. Meng eagerly, the meaning in his eyes was self-evident.

"Don't even think about it, that stuff is very expensive! You don't know how to treat or poison, so you can't help if you go up there. If you get infected, we'll have to take care of you!"

Mr. Meng's words were very straightforward. If Xuan Qi hadn't already understood the old man's temper, he would have been depressed even if he hadn't been angry.

Xuan Qi knew that the old man was concerned about him, and he also understood that he was telling the truth, so he finally nodded, "Xuan Qi is on the shore!"

It means to be available at any time, and at the end he added, "I'll have someone pass the message!"

Old Meng nodded with satisfaction, and under Xuan Qi's gaze, he boarded the boat alone, carrying his medicine box.

Liu Xu saw it from the deck and felt understanding and admiration in his heart.

The old man usually has a sharp tongue, but he actually has a soft heart. He still chose to board the ship even though he knew there might be danger.

Maybe he was interested in poison at first, but from the moment he put his own safety aside, he was just a doctor who wanted to save his soldiers and the people.

The boat was quickly pulled over by the guards, and Old Meng got on board nimbly.

"You silly girl, don't lie to me. Are you really that powerful?" Old Meng asked impatiently.

Liu Xu nodded solemnly, "Twenty guard soldiers, five of them have been infected even with protection."

Mr. Meng frowned when he heard this. It seems that it is indeed highly contagious.

"Let's go, old man, and take a look too!" As he said this, the old man was about to walk towards the cabin.

Liu Xu called him at this time, "Grandpa Meng, take precautions first!"

She also changed into a coat smoked with mugwort this morning, and even asked people to increase the frequency of fumigating the cabin, and asked Xuan Er to buy lime and vinegar.

Because from yesterday's case, she suspected that this was not just poison, or that the poison was just numbing everyone's vision, and it was more like some kind of disease.

The poison powder in the explosive pack was just a cover; the disease was spread through other means.

Mr. Meng paused and finally nodded.

After being fully armed, the two men entered the cabin.

Half an hour later, Elder Meng sat opposite Liu Xu with a serious expression, "Girl, tell me what you think."

"I suspect it's smallpox! They do have toxins in their bodies, but this poison is not very strong and can be cured by the previous antidote."

The reason why everyone thinks the antidote is useless is because these people are actually infected with smallpox.

The doctors in southern Xinjiang had preconceived ideas and thought it was some new poison, so they went in the wrong direction.

Moreover, in this era, there was no effective treatment for smallpox.

Elder Meng took a deep breath and said, "Girl, my diagnosis is the same as yours. I'm afraid we need to inform the Emperor and General Yang and the others as soon as possible."

Liu Xu nodded, "I know, I will ask Xuan Er to deliver the message, but for now we have to control the virus on the ship and prevent it from spreading."

Mr. Meng agreed, and then said with a smile: "Since it is smallpox, there is no need for the old man to do so many tricks."

He had had smallpox before, so he was not afraid. Liu Xu also smiled, and she felt relieved.

"But, girl, clean yourself up and don't go in again. Also, if those people on the ship have had smallpox, let them go back!"

Liu Xu nodded and asked Qiao Xin to inform Xuan Er.

"Grandpa Meng, do you have any way to treat smallpox?" Liu Xu asked again.

Elder Meng shook his head helplessly. "I can only relieve their symptoms. Whether they can hold on depends on themselves."

Even though Liu Xu had expected this, she was still a little disappointed.

In this era without vaccines, smallpox can be said to be the disease with the highest mortality rate and is extremely contagious.

Just as Mr. Meng said, this disease can only be cured by the patient himself.

She was just an ordinary white-collar worker in her previous life and knew nothing about medicine, but... those melodramatic novels seemed to mention that cowpox can prevent smallpox, but I wonder if that works?

Thinking of the millions of people in Dongsheng, she decided to give it a try. If she could really prevent it, then Nanyue's trick would be defeated.

"Grandpa Meng, I...I heard there is a way to prevent smallpox!" Liu Xu said hesitantly.

When Mr. Meng, who was writing a prescription, heard this, his hands trembled and the words under his pen were soaked in ink.

He raised his head suddenly, his eyes shining, and asked anxiously: "Girl, are you telling the truth?"

Liu Xu bit her lip, organized her words, and said, "I accidentally read in a miscellaneous book that cowpox can prevent smallpox. It means that the smallpox vaccine is obtained from cows and inoculated into humans, which can make people resistant to smallpox. I just don't know if it's true."

Mr. Meng frowned, thought for a moment, and said, "This idea is novel, but I have never heard of it. Is it feasible?"

Liu Xu shook her head gently, "I don't know either. But in this situation, maybe we can give it a try."

Mr. Meng hesitated for a moment and said, "This is a serious matter. Let me think about it."

Liu Xu nodded, knowing that the matter could not be rushed.

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