For the people of Han Chang'an, almost no one paid attention to the seven sons of Jian'an at the first time, and no one ridiculed Cao Pi's learning to bark on a donkey.

There was only one thing that made them pale:

Twenty-two years of Jian'an, the pandemic!

And unprecedentedly, a pandemic within a pandemic!

Among them, Liu Bei's face was the most serious, because he could be regarded as an elderly person by everyone present now, and the outbreak times of these epidemics that were casually listed by later generations were all experienced or heard of by Liu Bei himself.

That series of years marked by numbers, Liu Bei only needs a little recollection to match the number in his memory.

In the fourth year of Jianning, the east of the river was cracked, rain and hail fell, mountains and rivers burst out, and then the epidemic was rampant.

The first month of the second year of Xiping, the spring epidemic of the second year of Guanghe, and the spring epidemic of the fifth year of Guanghe......

For Liu Bei, those are memories that I can't bear to recall, but there was still a major epidemic in the twenty-second year of Jian'an?

Unconsciously, Liu Bei turned his stiff neck and looked at Doctor Zhang, after all, it is now the eighteenth year of Jian'an, and the time of the epidemic recorded in the history books of later generations is only four years away.

Zhang Zhongjing's brows were tightly knit and his face was serious, and he raised his head to meet Liu Bei's earnest gaze, as well as the gaze of Jian Yongfa, Zheng Pang Tong and others.

Even Zhang Fei suppressed his voice and muttered cautiously:

"Doctor Zhang, will there really be a big epidemic in another four years?"

Zhang Zhongjing can only be silent about this, he is not a sage, nor a supernatural person, but just a doctor who is killed by the typhoid epidemic and is determined to cure the disease and save people, how does he know about the future?

At the critical moment, Kong Ming was relieved, and he shook his head and said:

"With what we are doing now, the things of this world are different from what future generations know, how can Zhong Jinggong know?"

Liu Bei agreed, after all, according to the time known by later generations, he should still be fighting in Yizhou at this time, who would have thought that he would be sitting in Chang'an against Sun Cao's alliance at this time?

With the knowledge of later generations, the strength of all people will help the generals of the Han Dynasty and fight the grandson Cao Yujing.

In this case, Sun Cao and the two sides should not confront each other at the mouth of the water, so this epidemic...

"There is still a hidden danger of an outbreak in this pandemic."

After careful consideration, Zhang Zhongjing spoke cautiously, mercilessly erasing the trace of luck in Liu Bei's heart.

There was no need for Doctor Zhang to explain this carefully, Kong Ming sighed and explained:

"The records of later generations are all great epidemics, but since the year of Jianning, has the epidemic stopped for a year? It is nothing more than that these several times have hurt the people, so they are recorded in the annals of history. ”

In this regard, everyone also nodded silently, and they felt especially much about living in such troubled times.

Fortunately, there are cities and counties with surnames, and the outbreak of the epidemic will be reported layer by layer, and those remote villages are likely to die at the beginning of the epidemic, and it is not until a few years later that the merchants pass by to know the news of the village's demise.

I don't know how many things like this are.

Since he had said this, Kong Ming also sighed and continued:

"I have studied with Doctor Zhang, and almost all of the previous epidemics were accompanied by natural disasters."

Then he snapped his fingers and calculated:

"In 171 years, there were 12 cracks in the east of the river, the crack was 10 miles long and 170 steps, and the wide ones were more than 30 steps, destroying the people's houses and fertile fields."

"In 173, the North Sea was split, and the North Sea of Donglai overflowed, and the sea water was everywhere, and the fertile fields were all destroyed."

"In 179, the spring plague, the earth cracked in February and April in 178, the winter locust plague, and the plague came."

There is no need to say it later, the military advisor has said everything about this, and everyone present understands.

Natural disasters caused the people to become displaced people, and the people died and lived in the epidemic, and the displaced people carried the epidemic farther away, and finally the epidemic became its own.

"After making trouble for a long time, it turned out that the seventh son of Jian'an died indirectly at the hands of Cao Thief?" Zhang Fei couldn't help but say.

After all, if Cao's army did not attack south, it would be difficult for this plague to break out so big.

If Cao Jun didn't teach the class, it would be difficult for this plague to be brought back to Yecheng, and it would not end up in the end.

Ignoring his third brother, Liu Bei looked at the military advisor and nodded slowly, but he understood the meaning.

If we don't fight the disease, we won't have to wait four years from now, and every next major war will lead to a pandemic.

In this way, the selection of military doctors also needs to be put on the agenda faster, and Liu Bei has a plan in his heart.

Pang Tong and Fa Zheng also understood at the same time, but Fa Zheng immediately had a terrifying thought in his heart:

This Cao Cao was also good at killing miracle doctors before, and he neglected the prevention and control of epidemics so much, wouldn't it be okay......

Immediately, Fa Zheng shook his head, Cao Cao's command is also a Han'er, and now Sun Cao has joined forces to help the lord, why use this trick to kill a thousand enemies and lose eight hundred?

[And when it comes to the epidemic during this period, many people often have to talk about typhoid fever.

It should be noted that typhoid fever in the Han Dynasty is completely different from the typhoid fever we know now.

Restricted by knowledge, the ancients often regarded the cause of disease as the pathogen, and cold is not cold, but a general term for all diseases caused by external evils.

In modern times, after more than a thousand years, we can't know what kind of plague broke out in the Han Dynasty, and it is more likely that it is a compound plague with a mixture of diseases.

Because it is easy to find that the explosive population growth and lack of public health in the Eastern Han Dynasty may have been the biggest trigger for the outbreak of early epidemics.

Fortunately in the Western Han Dynasty, according to the documents at that time, the population of the capital Chang'an was nearly 500,000 at its peak, but it did not last long, and it was still within the carrying range of this capital.

In the Eastern Han Dynasty, on the basis of inheriting the foundation of the previous dynasty, the foreign enemy was destroyed, and the internal culture was repaired, and the population began to grow rapidly.

According to the Later Han Dynasty, in the fifth year of Yonghe, that is, in 140 years, there were 280,000 households in Luoyang, with a population of one million; Chang'an has 50,000 households and a population of 300,000.

The first thing that a huge population needs to face is the problem of garbage disposal.

Domestic sewage is relatively easy to dispose of, because both cities are close to large rivers and have well-developed water systems around them, so digging more ditches and paying attention to dredging in the city is not a problem.

The more troublesome thing is the disposal of solid waste, for the people at that time, it was nothing more than throwing away, burying and fleeing.

Among them, the most used is buried, this means is still used even in modern times, but we have a special sanitation department after the garbage is classified, according to the type of garbage in different ways to deal with different means.

For the ancients, it was to bury it all, dig a deep pit, pour garbage directly into the neighborhood, and add a layer of sealed soil when it is almost flush with the ground, and then dig a new garbage pit in another place.

According to our modern archaeologists, Han Chang'an is located in the Weihe River terrace, and the main component of the ground is the alluvial silt, clay, and gravel layer of the Weihe River.

By the time of the Northern and Southern Dynasties, this kind of garbage disposal method had made the environment of Han Chang'an unbearable, and it was directly scolded in the annals:

The adults in the capital are numerous, and after a long time, the bottom is narrow, and the filth and evil gather without leaking, and the water is salty and brine.

Faced with this already flavorful land, Emperor Wen of Sui Emperor Yang Jian simply abandoned the old site, built a new Daxing City on the southern slope of Longshouyuan in the southeast of Chang'an City in the Han Dynasty, and dug several ditches into the city to solve the water problem, and also formulated strict laws prohibiting the discarding of garbage.

This is the later Tang Chang'an City. 】

(End of chapter)