Estimating the size of COVID-19 epidemic outbreak

Chakrit Pongkitivanichkul; Daris Samart; Takol Tangphati; Phanit Koomhin; Pimchanok Pimton; Punsiri Dam-O; Apirak Payaka; Phongpichit Channuie

is the unstable node where this solution corresponds to the source or the origin of the dynamical system. On the other hand, the α * E,2 is the attractor fixed point which means the solution of the system asymptotically converging to this point. One may interpret the α * E,1 as the zero infected cases or starting point of the disease spreading while the maximum number of the infected cases and staying at this point under infinite time translation are represented by the α * E,2 solution. As the results, we see that the spread of the COVID-19 can be represented by the running epidemic strength effect in the RG flow framework. Interestingly, moreover, the microscopic theoretical method in physics is suitable and useful to study the macroscopic phenomena such as the COVID-19 spread in the present study. Then, we would call the epidemic strenght function in Eq.(1) in this work as the RG-inspired model.