An exploration of infectious Covid-19 and public health through network science

During the time 2019 winter, a mysterious virus came to the human land - coronavirus. This kind of virus had already damaged lots of families and the worst situation is that after the spread of COVID-2019, all the people in the family died and there was no one left in that family. First, in China, Wuhan, the increase in the number of confirmed cases of virus was terrible: almost 5000 per day. After the horrible increase in China, the virus happened everywhere. Humans need to fight with this `devil' together so that we lose many doctors and nurses. Moreover, during that time, people were in a panic, so they dare not go outside of the door. As a result, the whole economy may have a huge deficit. For society, people always afraid of others so some of them might have guns to protect themselves and this would cause the uncertainty of society. By using the SIR model for the dynamics of an epidemic, we can develop an exact solution of linear differential equations and statistic approaches.