"The meat ball virus, known as the meat cap virus, is named because it is a round meat ball as a whole, and the top of the spike on the surface is similar to the crown. The meat cap virus is an RNA single stranded virus, and its essence is a gene organism without reproductive ability. Because the meat cap virus itself has no reproductive ability, in order to reproduce and expand its team, they can only rely on the ability to reproduce Powerful organisms, through the camouflage of surface proteins, enter the nucleus of reproductive organisms and occupy the nucleus for breeding their own population. "

    "This is the essence of the war between virus and mankind."

    In such a large venue, the voice of Zhou Yalan''s explanation spread all over every corner through audio equipment.

    However, perhaps seeing many people''s confused expressions, Zhou Yalan said: "Maybe some people don''t understand it. Let me give a simple example. Each cell tissue in our body is equivalent to a biological factory, which can replicate and divide cell products, while the meat crown virus is equivalent to a bandit. He enters the factory director''s office through camouflage, kills the factory director, replaces himself, and then issues new production orders, which are produced by these orders His products are the biological products of his own family. "

    "This example is simple and easy to understand. A bandit occupied a factory, and then created more bandits with the help of factory equipment. He is ready to occupy more factories and create more bandits." sitting straight in the dark, he asked loudly, "teacher, what is RNA virus?"

    Sitting aside, Lu Xiping suddenly felt that he had become a little different and much more positive.

    Zhou Yalan smiled: "The so-called virus refers to the biological virus, which is a small non cellular organism with simple structure. Its structure usually contains only one kind of nucleic acid and protein shell, and the chemical composition of nucleic acid is divided into two kinds, one is DNA deoxynucleotide and the other is RNA RNA. The attribution of the virus can be obtained according to the different properties of nucleic acid, and Sarcocystis A virus is an RNA virus. "

    "What''s the difference between RNA virus and DNA virus?" Baili touhei asked again.

    Zhou Yalan said: "The nucleic acids of DNA viruses are usually double stranded, that is, like our DNA double helix structure, they are composed of two single strands; while the nucleic acids of RNA viruses are usually single stranded, that is, the double helix structure equivalent to DNA lacks one side of the chain. Of course, there are accidents in nature, including double stranded RNA viruses and single stranded DNA viruses, but this is not the model we explain today According to the characteristic of nucleic acid structure, DNA virus is relatively stable and difficult to mutate, while RNA virus often mutates in the process of replication due to its unstable structure, and the enzyme activity of its error correction mechanism is very low and almost has no effect. Therefore, RNA mutation is very fast, more dangerous and more difficult to deal with than DNA virus. "

    "Teacher, I''d like to ask a question. Can''t our research speed keep up with the evolution speed of corolla virus?"

    Lu Xiping became more and more familiar with it. Many of what Zhou Yalan said was basically the same as that of the two giants he dreamed of last night, but he did not carefully understand biology. Even if the dream was subconscious, it could not exceed his own level of knowledge and cognitive ability, so he was basically sure that last night''s dream was definitely not a simple dream. Instead, in order to get a better understanding of biology After verifying the contents of the dream, he took the initiative to ask questions.

    Zhou Yalan was stunned on her white face. It was obvious that she didn''t expect someone to ask this painful question.

    She said slowly, "I''ll talk about this later. Now I''ll explain the scheduled course to you, so that you can fully understand the meat crown virus and how to prevent it."

    Lu Xiping didn''t say anything more, so he listened quietly.

    Zhou Yalan then said: "There are four modes of transmission of coronavirus. The first is direct transmission, which means that patients sneeze, cough, speak droplets and exhale gas directly infect others; the second is aerosol transmission, which means that droplets are mixed in the air to form aerosols and cause infection after being inhaled by people; the third is contact transmission, which means that the virus is temporarily attached to the body surface and object surface The fourth is mother to child transmission, which means that the mother infects the virus and then transmits it to the baby through the placenta. "

    "Among the above four modes of transmission, aerosol transmission is the most dangerous and hidden. Therefore, if you go to the great wall of the border in the future, you must wear virus protection combat clothing. This is a combat clothing specially developed by the military and our virus research institute, which can effectively prevent viruses."

    "However, even if you wear a virus suit, you should try your best to avoid close contact with zombies or even hand to hand combat. Otherwise, once the suit is damaged, you will face direct transmission and contact transmission. Although these two modes of transmission are not as hidden as aerosol, the infection rate is higher. Once you get caught, you will be infected. Therefore, if the virus suit is accidentally broken , you should immediately use alcohol to kill viruses, and then evacuate the Great Wall in time. "

    "This is the transmission mode, protection methods and points for attention of meat crown virus."

    After Zhou Yalan finished, she played the next PPT and saw all kinds of disgusting zombies on the picture.

    "Next, let me explain all kinds of corolla viruses and their corresponding zombies, which is also the real situation you will encounter in the future."

    "A long time ago, after we completely cut off the connection with the outside world, the domestic meat crown virus was basically eliminated, but we could not stop the spread and evolution of the outside virus. After this period of rapid evolution, the outside virus has evolved at least more than 20 new versions, and each new virus has different characteristics, and the rate of zombization after infection Different degrees... "

    Hearing this, Lu Xiping really hated.

    He couldn''t help thinking of the comments of the two giants in his dream. They were really unlucky and caught up with a group of blue star pig teammates!

    At the time of the outbreak of the coronal virus, China had already sent a danger signal. However, some foreign countries were very proud of themselves and did not pay attention to the coronal virus at all. They only treated it as an ordinary influenza and even shouted mass immunization, which led to the coronal virus sweeping the world.

    After that, coronavirus had a large number of evolutionary hotbeds and began to evolve rapidly. Even at this time, some foreign countries still don''t pay attention to it. The commander of the beautiful country even claimed that the virus is not dangerous and will disappear naturally in summer. Some of his NT supporters shouted that the corolla virus is a fraud and want to deprive them of their freedom.

    As a result, the more the coronavirus evolves, the more dangerous it is. From the beginning, it will only cause pneumonia, and then the infected people gradually appear uncontrollable zombization. At this point, it is basically powerless to return to the sky. Those arrogant countries abroad have also paid a price for their ignorance and arrogance. They have successively fallen into the zombie area, exterminating their families and countries. Isn''t this a pig teammate?

    If the pig knows, the pig will protest: it''s none of my business. Why do you involve me in everything? I''m not so stupid, okay?