Outside the southern city of Chang'an City, Li Ke, who knew that he was under the threat of various epidemics, couldn't help but feel a pang in his heart, there is no vaccine in this era that can prevent various infectious diseases, and everyone needs to see luck to survive in infectious diseases. Pen & Fun & Pavilion www.biquge.info whenever the epidemic comes, whether it is the ordinary people who are ordered not to leave home, or the high-ranking Lao Li, in the face of the epidemic, they can only pray like heaven that the disaster will not spread to themselves, and the emperor who is virtuous but does not know the truth will even link this disaster with his own morality, thinking that his lack of virtue leads to the epidemic from heaven, and then the next unwarranted edict of sin, as if the edict of guilt can not harm the subjects of the king,

Although Li Ke knew that cowpox could prevent smallpox, he couldn't guarantee when a SARS or something infectious virus would come, Li Ke was really helpless, and now it is not a future generation with developed medical treatment. But then again, even in later generations, variants like avian flu have not been completely eradicated.

After experiencing the scene on the street before, Li Ke's mind is now full of how to improve the health level of himself and the entire Chang'an, and how to prevent the spread of infectious substances and their carriers as much as possible, because in Li Ke's not much memory of the treatment of epidemics in later generations, strengthening the hygiene level of drinking water and food can indeed make people avoid a large part of germs and viruses, and the improvement of medical and health standards does have an impact on people's life expectancy.

As for the Hu people and foreigners who may carry germs, Li Ke can apply to Lao Li for a petty official who manages the Chang'an Medical and Health Department, and make an agency similar to the customs seizure of alien biological species in later generations, so as to screen the Hu people in the Western Regions, the Nanyang natives, and the Western Europa people into the city.

As soon as the carriage passed through the city gate, without waiting for the city gate guards to come over to do an inspection, Li Ke shouted to the eunuch driving outside the car to stop, because at this time Li Ke had a whim to get off the carriage and inspect the water quality of the moat outside Chang'an City to do a practical investigation of the quality of drinking water in this era. to determine whether the water in Chang'an City meets the drinking standards.

"Pheasant slave, you take care of the little son here, the third brother has something to do first." Li Ke covered the sleeping little son with a white velvet fox fur, turned around and said to Li Zhi lightly.

"Oh", as the prince, Li Zhi had already anticipated what might happen at any time during the prince's relocation, obviously thinking that Li Ke was going to arrange for himself and his little son to move in first, so he didn't ask too much and answered softly.

Out of the carriage, Li Ke called his palace guards, and asked Yuan Kui to follow the light car Jian to leave the Mingde Gate first, leaving the little Zhengtai Li Zhi and the goalkeeper with a confused face to negotiate the violation of the relocation items.

Li Ke and his entourage walked along the moat, the green grass by the river, from time to time there were young girls and old women laughing along the river under the warm winter sun, but they didn't see the willows by the river, only to see a small tree stump in the distance was lonely and covered by wild grass, almost Li Ke couldn't find this small stump.

"Why is this tree gone?" Li Ke walked over to the stump and asked. The Tang Dynasty had requirements for the trees to be cut down, and those that did not become timber would not be cut down.

Akui followed behind and replied: "This moat was originally not planted with trees, and legend has it that there were willow trees on the side of the moat in our Chang'an, but because of the war later, the former generals cut down these willow trees regardless of size to prevent the trees from being used by the besiegers... ”

"Oh," Li Ke, who knew the reason, quickly interrupted Akui's words and asked, "Then where can I find a long wooden pole?" ”

Akui reacted at this time, it turned out that Li Ke wanted to cut down trees to make wooden poles. "How long does Your Highness want a wooden pole?"

"It's best to be close to a foot."

"No, Aqua will send someone to look for it in the convoy."

"Where does the drinking water of our Chang'an people come from," Li Ke frowned as he looked at the slightly filthy water of the moat.

As if to see Li Ke's thoughts, Akui gushed endlessly: "Most of the water drunk by the people in our Chang'an City comes from underground, and each workshop has arranged a centralized well for the people in the workshop to take water, because the scale of our Chang'an City is too large, most of the people go to the nearby well to get water, but the water of the moat and the river in the city is not directly taken to drink, but only used for washing vegetables and laundry." ”

Although the water of the moat is not directly drunk, the quality of the river water can often reflect the pollution degree of surface water by all the people in Chang'an City, because the water needed by an ordinary household may be taken from their own homes or wells, but when the water is used by people, people will often discharge it directly into the moat or the nearest river without treatment.

You must know that Chang'an is already a mega city with a population of one million at this time, everyone has water needs and drainage needs, and when people frequently discharge sewage into the river, the river water will be polluted and undrinkable over time, and even these pollutants will penetrate into the ground to pollute the underground water. After a period of time, the underground drinking water system in the city is slowly polluted like a power line that has fallen into disrepair and aging, thus threatening people's health.

Li Ke saw that the guards found a long bamboo pole, and prepared to insert the bamboo pole into the water of the moat to see the visibility in the water of the moat, that is, to engrave a red mark on the top of a long bamboo pole, and then slowly insert it into the water, but when the red mark gradually became invisible, record the length of the part of the bamboo pole inserted into the water, the more thorough and clean the water quality, the higher the visibility.

Li Ke made a simple visibility test rod according to the requirements of his memories in his previous life, and was about to get close to the moat and insert the bamboo pole into the water.

Yuan Kui next to him hurriedly took the bamboo pole in Li Ke's hand, and stopped anxiously with doubts: "Your Highness, this can't be helped." ”

"Oh, why is that?" Li Ke stopped what he was doing.

"Your Highness, this matter is a bit unlucky, I heard the old people say that all the moats on the edge of the city have experienced wars, failed in the siege, and the soldiers who died in the moat often have unjust souls and rivers in the river, if Your Highness accidentally disturbs these unjust souls, you may be sick, so Your Highness must not go to the bottom of the river to risk yourself."

The memories of Li Ke's two lives are intertwined, and he said in his heart: The ancients are worthy of being ancients, and they can find that the accumulation of dead bodies after the war will bring about epidemics, but they are indeed ancients, not modern people who have cleared everything, they only know that the cause of the epidemic is caused by corpses, but they don't know that it is the spread of germs that will lead to a great epidemic after the war, and they can only shirk it on the ethereal ghosts and ghosts.

He handed the bamboo pole to the guard beside him, who knew that he was going to stab the bottom of the moat, and he was also a little timid, afraid of drawing out the unjust souls at the bottom of the river for his life.

Li Ke said to the guard: "You don't need to poke to the end, when you can't see this red dot, you can stop and record the length of the bamboo pole immersed in the water." ”