The virus can't live on its own. It has to live on other host cells. When a virus parasitizes, it often goes through the processes of adsorption and entry, shelling, biosynthesis, assembly and exit. First, adsorption and entry: the virus enters the place close to the alveoli through the respiratory tract, and combines with the receptors of some cells with echinoid protein, thus deceiving the cells, and quickly enters the host cells through the lipid bilayer. Because of the high level of ACE2 protein in our respiratory ciliary cells and alveolar epithelial cells, the new coronavirus will first attack the lung. Then, shelling: after the virus enters the cell, the protein nucleocapsid of the virus attracts lysosomes to inactivate it. Then, synthesis: when the genetic material RNA invades the cell's synthesis workshop ribosome, the virus propagates wantonly. Finally, assembly and export: so far, we have obtained three main accessories, which can complete the core assembly. According to some theories, lipid envelope is mainly obtained by differentiation of lipid membrane through endoplasmic reticulum or cell membrane. The virus completed the whole process of one replication. It can choose to increase passively with cell replication, or it can reproduce in large numbers, causing direct toxic damage to cells and resource encroachment.<br>
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