Research On The Basic Reprouction Number Of COVID-19 Based On The SIR Model

The problem of infectious diseases has been a major problem threatening human existence since ancient times.Since the novel coronavirus pneumonia first broke out in Hubei Province,China at the end of 2019,the virus has ravaged all over the world in the past three years,causing incalculable losses,and it is a catastrophe faced by all mankind.My country has been actively taking various medical prevention and control measures to set an example for the people of the world.Therefore,it is very important to study the transmission mechanism,transmission route,infection cycle,incubation period and other issues of the new coronavirus pneumonia.Through the study of the virus,people can increase their understanding and cognition so as to facilitate various prevention and control measures and to win this battle against the epidemic.Based on the SIR classic warehouse model,this paper selects data from Hubei and Changchun to conduct research on the outbreak of novel coronavirus pneumonia.First,the current situation of the epidemic situation we are facing is introduced,and the SIR model is introduced and its related theoretical basis and mathematical knowledge are briefly explained.The infection rate coefficient β and the emigration rate coefficient γ were used for parameter estimation,and the basic reproduction number,an important indicator to measure the disease situation,was calculated,and the impact of different prevention and control measures on the virus transmission was analyzed.