The man finally decided that he was right in thinking that the milkmaids had been suffering from 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 serum was then injected into a young boy who had never had cowpox or smallpox before.

After two days, the boy felt a little uncomfortable, but he recovered quickly, and after two months, the man was convinced that the boy's resistance had built up.

Now the task is to prove the boy's resistance to smallpox by experiments. He takes some pus from the acne of a patient who is suffering from smallpox and injects it into the boy.

A week has passed and the boy is free of smallpox, and a month has passed and the boy is still safe.

That person's dangling heart finally let go, yes, that person succeeded, and successfully developed cowpox to prevent smallpox.

\". Vaccination with cowpox? What is this?\" Elsa asked in confusion.

I was thinking about vaccinating cowpox, is it a cow thing? This is too strange.

\"Vaccination with cowpox can only save those who did not suffer from smallpox. As for those who had smallpox before, they can only look at their good fortune. It is up to them to survive." Liu Feng said.

At present, there is no method that works for smallpox virus, and the only thing we can do now is prevention.

\"That's better than nothing, since it can make those who haven't been sick safe, that's also good.\" Elsa said.

Shi Er Niang doesn't expect too much at this moment, as long as the rest of the people can save their lives, that's fine.

\"Well, since that's the case, let's start vaccinating cowpox.\"Liu Feng nodded and said.

\"Then what should I do?\" Elsa stood up earnestly. Before, she couldn't help, but now that she heard that there was a way to save the tribe, of course she hoped that she could help too. \"You need to find someone with cowpox and try it on you.\" Liu Feng said.

talent. \"Second shift, V). Please customize, please support.\"

The second thousand and sixty-ninth chapters: a static and a moving dispute.

The chaotic land has been raining and the sky has been sunny, and the warm sunshine is all over the land, and the people of the Principality of Maner are working.

Because summer is here, everyone should hurry up and plant some crops, otherwise there will be no harvest in autumn.

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

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

After all, if she wants to thrive, she needs a bigger place, and the whole chaotic place is her goal.

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

But what Snake always thought was that the place was too small, which hindered her limitation.

That's why I want to take the entire chaotic land, so as to develop 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 has not stabilized yet, so would it not be good to attack the other two duchies?

At that time, if you win, you can say it, but if you lose, what should you do?

The Principality of Maner has no way to develop well now, and it is inevitable that it will be a little exhausted if it has to spare its manpower to attack the other two principalities. What she is more worried about is the panic of people. If a large number of knights are excluded from going out, then the people in the Duchy of Maner should be ready to move. \"Your Majesty, I think we can attack directly, so that we can capture the entire Chaos Land before winter comes.\" Obi said seriously.

He is still more in favor of attacking, and he cannot tolerate the rampant arrogance of the other two principalities in his eyes.

And the ambition is also relatively large, wanting the snake girl to rule the entire chaotic land at once, and become the biggest queen, so that it can be regarded as reviving 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 agree with it at the first time.

\"You don't know the current situation in the Principality of Man'er. If you rashly attack the other two duchies, it will definitely have an impact on the place we have now.\" Ryan analyzed.

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

The strength of the other two principalities is not bad either, so doing so would undoubtedly be too risky.

If the attack is successful, it is a good thing to be able to take down the other two principalities, but what if you can't take it and are embezzled by the other side instead?

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

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

This is the temper of the cattle orcs. Now that he hears that there is a war to fight, but he hears that others want to stop it, he is naturally unhappy. \"Do you want to put the entire Principality of Man Er into a dangerous situation?\"Ryan carried out the torture of his soul.

Hu Erniang couldn't bear to let the entire Principality of Man Er take risks, it would be fine if it was still the same as before.

Before that, there was no fixed place, and even if there was, it was a small city.

But now it's different. Now that you have an entire principality, the responsibility on your shoulders is even heavier.

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

Because sometimes you make a wrong decision, and the entire Principality will be put into a dangerous situation.

\"If you don't try it, how do you know it's dangerous? You have to try everything before you know it.\" Obi refused to admit defeat and replied. The cattle orcs can't think so much. All he thinks about is to use his fists to solve the problem.

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

It is completely possible to win the other two principalities, and not to the point where you are now timid.

Only after winning the other two principalities, the whole chaotic land truly belongs to Bella.

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

\"I know how you feel, and I want to unify the whole mess, but it's not something that can be done by thinking.\" Ryan continued.

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

Just take down the entire Chaos Land. \" Obi said in a loud voice.

The cattle orcs still don't understand it very much. In his opinion, being direct is better than beating around the bush.

\"Then you won the Chaos Land, do you also have the skills to go on a rampage to attack the other two principalities?\" Ryan asked back. Although Hu Erniang said that the time spent with the orcs of the cattle tribe was not short, she still did not agree with the other party's philosophy.

She still felt that no matter what she did, she had to follow the rules and have a plan.

\"Then you just think of a little skill, and then we go directly to attack.\" Obi said seriously.

At this moment, he can't wait a little bit. In fact, when he just won the Duchy of Maner, he really wanted to attack the other two duchies. However, since there were actually more damages at that time, and the Duchy of Maner had just been won, it would take time to repair it.

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

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

\"Aren't we just trying to figure out a way now? Why are you in such a hurry?\"Rian was a little angry.

The usual fox ears can be said to be very good-natured and stable, but this time I was really a little irritated.

\"Okay, don't make any more noise, just chattered as soon as you came in.\" Bella said seriously.

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