You Kexin asked, "Zhen Zhen, do you still have friends in the disease control system? When did you meet and how was the relationship?"

Looking at You Kexin's gossip look, Ye Zhenzhen smiled weakly: "That is, an ordinary friend, he recommended a few standing books of the disease control system, I haven't read this one, so I bought it online to take a look." Pen × fun × Pavilion www. ｂｉｑｕｇｅ。 ｉｎｆｏ”

Zhang Zhongsheng looked at the blue book cover, "Emergency and Disposal of Bioterror", he had never read it before, so he asked curiously: "Sister Zhenzhen, when you finish reading, can you borrow it from me?"

"No problem, if you want to see it, you can take it now. ”

Zhang Zhongsheng was overjoyed, "Really? I can really take it away now?" The book that Sister Zhen Zhen just bought was taken away by me before she even looked at it, and she was a little embarrassed. ”

Ye Zhenzhen stuffed the book into Zhang Zhongsheng's hand and said with a smile: "It's okay, you read it first, and bring it to me next time you come to the laboratory." ”

Zhang Zhongsheng accepted the book and thanked: "Okay, then I'll return it on Tuesday." ”

You Kexin smiled: "In less than two days, can you finish reading such a thick book?"

"Reading books requires an outline, and this is not an exam, just understanding, two days is enough. ”

Zhang Zhongsheng flipped through the book casually, and after looking at it twice, he closed the book and couldn't help but sneeze twice.

Ye Zhenzhen urged again: "If you have a severe cold, go back and rest." ”

Zhang Zhongsheng rubbed his head as if he had a headache, and said helplessly: "This cold seems to be very serious, my head hurts a little, go back to sleep and it's fine, oh, by the way, Sister Zhenzhen, I will go to the sheep ranch in the northern suburbs tomorrow morning, and Teacher Xiao Chen, who took our experimental class, also had a severe cold, and she asked me to help her go to the sheep ranch tomorrow to pick a sheep for another class." ”

You Kexin frowned and asked, "Didn't you just go to the sheep pasture in the northern suburbs last week to buy sheep?

Zhang Zhongsheng complained with rare anger in his tone: " It's not because of the rancher, last time we went, to pick sheep by ourselves, but he only took us to a small sheepfold, there are more than 20 sheep, but each of them is old and weak, I and Xiao Chen teacher asked to go to the larger sheepfold, but he refused very badly, as if we deliberately found fault, there are thousands of sheep in the sheep pasture in the northern suburbs, but only give us a few old, weak, sick and disabled sheep, Xiao Chen teacher was angry, said that he wanted to change the location of buying sheep, and we S City is not the only one of their pastures, but the rancher is even more annoying, what to say, if you want to change, say that other people's sheep are not as good as his。 ”

You Kexin: "Then you didn't buy sheep from his ranch last time?"

"Bought it. ”

"Why? Aren't the sheep on their pasture of bad quality? Why do you buy them?"

Zhang Zhongsheng said helplessly: "Because the experimental class is in a hurry, and the logistics department has signed a contract with his ranch, designating the sheep ranch in the northern suburbs to provide sheep for the school, and it will not be easy to change it for a while." ”

"Hey, the school's efficiency is too low, is it so difficult to change suppliers? Then do you still want to go to the sheep pasture in the northern suburbs tomorrow to buy that old, weak, sick and disabled sheep?"

"Yes, there is no way, but this time I will go, I must find the big sheepfold and choose from there, otherwise, don't blame me for being unkind. ”

Zhang Zhongsheng said, unconsciously clenching his fists.

Ye Zhenzhen looked at it, and a strange feeling was born in her heart, today's Zhongsheng is a little weird, a boy who is usually so gentle and sunny, today is a little inexplicably anxious, is it because of a cold? Thinking of this, Ye Zhenzhen urged again: "Zhongsheng, go back and rest, see that your forehead is sweaty, you can only work after resting, go back quickly." ”

Zhang Zhongsheng seemed to be a little unable to support it, wiped the sweat on his forehead with his hand, nodded and said: "Yes, you will sweat when you have a cold, the symptoms of this flu are really different from the past, Sister Zhenzhen, Sister Kexin, I went back, remember to call me before the experiment on Tuesday." ”

"Okay, no problem. ”

Zhang Zhongsheng confirmed again and again before leaving Professor Zhang's laboratory.

As soon as Zhang Zhongsheng left, You Kexin touched his forehead and sighed: "This influenza seems to be very serious, I want to go back and take some medicine to prevent it." ”

Ye Zhenzhen smiled: "If it is really the flu, you can't prevent it by taking any medicine, unless you usually exercise, improve your own immunity, or inject the flu vaccine before the flu season, however, the flu virus will have genetic mutations every time it appears, and even change the subtype, and vaccination sometimes can't prevent it." ”

You Kexin: "According to what you say, no matter how you prevent it, you will get the flu, and if you get the flu, it is useless to take medicine?"

"No, our human body has immune memory function, infected with a flu virus, it will produce corresponding antibodies, and wait until the second flu season, the flu has mutated, but this mutation is sometimes small, sometimes large, mutation is small, the original body produced antibodies, will have cross-reaction with the new influenza virus, the human body has a certain resistance to the influenza virus with small mutations at this time, it is not easy to be infected, on the contrary, if the influenza virus mutates large, the original antibody produced in the body and the new virus cross-react less, at this time, the human body is more likely to be infected with the new virus; 。 ”

You Kexin: "Listen to you say this, the flu virus mutates frequently, and during the flu season, everyone can be infected with the flu virus. ”

"Well, theoretically, this is the case, but after being infected with the influenza virus, the symptoms and severity are different, some young adults with good resistance, after being infected with the influenza virus, their own immune system will kill the influenza virus in the body before the cold symptoms appear, these people are called negative infection, which refers to being infected with the virus but not showing symptoms; ”

You Kexin: "Is it as serious as you said? If you have a cold, you will kill someone?"

"Well, many more people died from the flu than in the war, and it is well documented and well-known that from 1918 to 1920, there was a famous severe influenza pandemic in the history of the world - the Spanish flu, which spread all over the world, with three epidemic climaxes in a few years, and the clinical incidence was as high as 40% These and many types of pneumonia complications have caused 20 million to 40 million deaths worldwide, significantly more than the 8.5 million deaths caused by World War I.

Since then, there have been more than three influenza pandemics in the world, namely the Asian influenza caused by the influenza A virus (H2N2) that began in 1957, the Hong Kong influenza caused by the influenza A virus (H3N2) that appeared in 1968, and the Russian virus that occurred in 1977 due to the influenza A virus (H1N1). Every time the subtype of the influenza virus changes, it leads to an influenza pandemic, which in turn causes a large number of deaths. ”