monitoring covid-19 is like instrument flying

Summary: introduction/purpose: to monitor the covid-19 epidemic in every single country in the world, this team has developed a specific system that consists of the following diagrams and mathematical models: а) epidemiological curve, b) histogram of infected people, c) histogram of infected people in last five days, d) double logarithmic curve for monitoring the speed of the epidemic, e) epidemic pipeline and f) gaussian and boltzmann s curves. as it is shown in this paper, monitoring an epidemic is like flying a plane using instruments. methods: the most complex model is the calculation of the truncated gaussian curve, and this model will be discussed in more detail in this paper. also, there is time coincidence between the gaussian curve and the s-curve. the input data were found in the world health organization's daily reports. the full set of data consists of the gaussian curve, the double logarithmic curve, and the epidemic curve. in some cases, using only one of the three specified parameters is not enough. results: to prove a specified methodology, the paper has dozens of results in the form of diagrams. conclusion: the gaussian curve was formed, and the end of the epidemic was calculated. but, in some cases, the epidemic curve was not wellformed (the end of the epidemic is not clear since many countries did not declare the number of recovered people in a proper way). this is the reason why we must include a flow of the double logarithmic curve into consideration. only a combination of these three diagrams can give the right insight into the right decision.