The model reaction constants (parameters) and initial individual populations for COVID-19 epidemic outbreak with their biological definitions, all data are confirmed cases in China presented in .
|Symbols||Biological definitions||Estimated values|
|S(0)||Initial susceptible individuals||11.081 × 106|
|E(0)||Initial exposed individuals||105.1|
|I(0)||Initial symptomatic infected individuals||27.679|
|A(0)||Initial pre-symptomatic infected individuals||53.839|
|Sq(0)||Initial quarantined susceptible individuals||739|
|Eq(0)||Initial quarantined exposed individuals||1.1642|
|H(0)||Initial quarantined hospitalized individuals||1|
|R(0)||Initial recovered individuals||2|
|k2||Probability of transmission per contact||2.1011 × 10−8|
|k3||Quarantined rate of exposed individuals||1.8887 × 10−7|
|k4||Transition rate of exposed individuals to the infected class|
|k5||The multiple of the transmissibility of A to I||0.3|
|k6||Rate at which the quarantined uninfected contacts were released into the wider community|
|k7||Probability of having symptoms among infected individuals||0.86834|
|k8||Transition rate of symptomatic infected individuals to the quarantined infected class||0.13266|
|k9||Transition rate of quarantined exposed individuals to the quarantined infected class||0.1259|
|k10||Recovery rate of symptomatic infected individuals||0.33029|
|k11||Recovery rate of asymptomatic infected individuals||0.13978|
|k12||Recovery rate of quarantined infected individuals||0.11624|
|k13||Disease-induced death rate||1.7826 × 10−5|
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