FIG. 2. Individual mortality.
(a) Recovery time after first symptoms occurred based on individual data of 178 patients [35]. The inset shows the age distribution of these patients. (b) Death- and recovery rates as defined in Eq. (4). The death rate μ(τ1) approaches μ1 for τ1 > τinc, where τinc is the incubation period and τ1 is the time the patient has been infected before first being tested positive. (c) The individual mortality ratio M1(t|τ1) for τinc = 6.4 days at different values of τ1. Note that the individual death probability Pd(t|τ1) and M1(t|τ1) are nonzero only after t > τinc − τ1. (d) The asymptotic individual mortality ratio M1(∞) (see Eq. (3)) as a function of τ1.