The man eventually decided he was right in thinking that the milkmaids had had cowpox, which gave them a resistance that would protect them from smallpox. So he decided to do an experiment to test his conjecture. He took some pox pulp from the blisters of a milkmaid who was suffering from cowpox.

The pox paste was then injected into a young boy who had never had cowpox or smallpox before.

After two days, the boy felt a little unwell, but soon got better, and after two months, the man was sure that the boy's resistance had been established.

Now the task is to prove that the boy is resistant to smallpox by experiment. He takes some pus from the smallpox of the patient who is suffering from smallpox and injects it into the boy.

A week passed, and the boy was free from smallpox, and a month passed, and the boy was still safe and sound.

The hanging heart of that person was finally let go. Yes, that person succeeded. He successfully developed vaccinia to prevent smallpox.

". Vaccination? What is this?" Elsa asked confused.

I thought about vaccination with cowpox, is it something from cows? This is too strange.

"Vaccination can only save those who don't have smallpox. As for those who got smallpox before, it depends on their luck. Whether they can survive is entirely up to themselves," Liu Feng said.

There is currently no method that is effective against the smallpox virus, and the only thing we can do now is to prevent it.

"That's better than nothing, since it can make those who have never been sick safe, that's also good." Elsa said.

The lion's ear girl doesn't expect too much at this moment, as long as it can keep the rest of the people alive, that's good.

"Well, in this case, let's start vaccination." Liu Feng nodded.

"What do I need to do?" Elsa stood up seriously. She couldn't help before, but now that she heard that there was a way to save the tribe, of course she hoped that she could help too. "We need to find people with cowpox, and then test it on you." Liu Feng said.

talent. "Second update, V). Please customize, please support."

The second thousand and sixty-nine chapters: a dispute between silence and movement.

After the rain in the land of chaos, the sun is shining and the people of the Principality of Man are working.

Because summer is here, everyone has to plant some crops as soon as possible, otherwise there will be no harvest in autumn.

In the palace of Silver City, Bella was sitting on the main seat discussing matters with everyone.

They plan to attack the other two principalities, and want to unify the entire chaotic land within this year.

After all, if she wants to develop aggressively, she needs a bigger place, and the entire chaotic land is her goal.

She is very dissatisfied with the current development of the Principality of Maner, although it has not developed very well.

But what Snake always thinks is because the place is too small, which hinders her confinement.

That's why I want to win the entire chaotic land, so as to develop it well, so as to revive the glory of the Brutus orc kingdom.

"Your Majesty, I think the attack on the other two principalities can be delayed for a while." Ryan suggested.

What Hu Erniang is more worried about is that the Principality of Maner is not stable yet, so will it be bad to attack the other two principalities?

At that time, if you win, it's okay, but if you lose, what should you do?

The Principality of Maner has no way to develop well now, and it has to spare manpower to attack the other two principalities. It is inevitable that it will be a little exhausting. What she is more worried about is that people are panicking. If a large number of knights are excluded, the people in the Principality of Maner will be ready to move again. "Your Majesty, I think we can attack directly, so that we can take down the entire chaotic land before winter arrives." Obi said seriously.

He is still more in favor of attacking, and he can't tolerate the rampantness of the other two duchies in his eyes.

And her ambitions are relatively high. She wants Snake Girl to rule the entire chaotic land at once and become the biggest queen. Only in this way can she revive the glory of the Brutus orc kingdom.

And he is used to fighting on the battlefield. Now that he hears that there is a war, he must be the first to agree.

"You don't know the current situation in the Principality of Maner. If you rashly attack the other two principalities, it will definitely have an impact on the place we currently own." Ryan analyzed.

Hu Er Niang is still relatively smart, knowing that she has not fully grown up (bgfg), so she should not attack the other two duchies.

The strength of the other two duchies is not bad either, it would undoubtedly be too risky to do so.

If the attack was successful, it would be a good thing to be able to take the other two duchies, but what if they were embezzled by the other party instead?

Will the Principality of Maner, which was won so hard, be handed over to others? What about those who died before?

"You've been cowering all day long. I don't know what you're worried about. If you don't try bravely, how will you know if you can take down the entire chaotic place?" Obi said seriously.

This is the temper of the cattle orcs. He is naturally unhappy when he hears that there is a war to fight, but he hears that others want to stop it. "Do you want to put the entire Duchy of Man in danger?" Ryan tortured his soul.

The fox-eared lady couldn't bear to let everyone in the Man'er Principality take risks, and it would be fine if it remained the same as before.

As before, there was no fixed place, even if there was, it would be a small city.

But it's different now. Now that he owns an entire principality, the responsibilities on his shoulders are even heavier.

I can no longer be as reckless and bold as before, and now I have to think before and after everything I do.

Because sometimes a wrong decision of yours will put the entire principality in danger.

"If you don't try it, how will you know it's dangerous? You have to try everything before you know it." Obi refused to admit defeat and said with patience. The bull orc can't think so much, he always thinks about solving it with his fists.

As long as the matter can be solved with fists, it is not a matter. He feels that the strength of the Principality of Maner is very strong anyway.

It is entirely possible to take down the other two duchies, and it is not to the point of being timid now.

Only after taking down the other two duchies, will the entire chaotic land truly belong to Bella.

The only thing he thinks about now is to unify the entire chaotic land as soon as possible.

"I know how you feel, and I also want to unify the whole chaos as soon as possible, but this is not something that can be done by thinking about it." Ryan continued.

"Then don't think about it, wouldn't it be better to speak directly with actions?

Just take down the entire chaotic land directly. "Obi said in a tone of voice.

The bull orcs still didn't understand very much. In his opinion, it's better to be straightforward than to beat around the bush like now.

"Then if you win the land of chaos, don't you also need to have the skills to attack the other two duchies directly?" Ryan asked back. Although Hu Erniang said that she had not been with the cattle orcs for a short time, she still disagreed with the other party's ideas.

She still feels that no matter what she does, she must follow the rules and have a plan.

"Then just think about some skills, and then we'll go directly to attack." Obi said seriously.

At this moment, he couldn't wait any longer. In fact, when he just won the Principality of Maner, he really wanted to attack the other two principalities. However, since there were actually a lot of injuries at that time, and the Duchy of Manel had just been won, it took time to repair it.

Now after such a long rest, and after hearing the news that the other two duchies have turned to the Han Dynasty for help.

He couldn't wait to win the other two duchies, how could he allow them to continue rampant.

"Then aren't we just trying to find a way now? Why are you so anxious?" Ryan was a little angry.

The usual fox ear girl can be said to have a good temper and a very steady temper, but this time she was really a little irritated.

"Okay, stop arguing, you've been chattering since you came in." Bella said seriously.

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