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Diagram of the epidemic model states. The six stages of COVID-19 disease progression and their transition probabilities: susceptible (S), infected (I), mild (M), critical (C), recovered with immunity (R) and died from COVID-19 (D). Infected asymptomatic stage (I) describes the situation when the individual is already contagious, but does not show any symptoms. Besides these states the model differentiates between COVID-19 and non-COVID-19 related critical state and death.
