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Table 1 Parameters used in the SEIAR and SEIAR-CQFH models

From: Quantitative assessment of the effectiveness of joint measures led by Fangcang shelter hospitals in response to COVID-19 epidemic in Wuhan, China

Parameter Implication Value Sources
β0 The transmission rate of symptomatic infectious before Jan 23 0.43 (95%CI: 0.428–0.431) Estimated
βend The minimum transmission rate of symptomatic infectious under interventions after Jan 23 0.05 (95%CI: 0.049–0.051) Estimated
r Exponential decreasing rate of transmission rate of symptomatic infectious under interventions after Jan 23 0.072 (95%CI: 0.0715–0.0728) Estimated
fE The fitted transmission rate with respect to exposed individuals 1/3 Ref [7]
fA The fitted transmission rate with respect to asymptomatic infectious 1/3 Ref [7]
fC The fitted transmission rate with respect to home isolated symptomatic infectious 1 Assumed
1/σ Incubation period 5.2 Ref [8,9,10]
ρ The probability that each exposed individual
enters the symptomatic compartments
0.82 Ref [11]
1/γI The average duration of the infection of symptomatic infectious 12 Ref [10]
1/γA The average duration of the infection of asymptomatic infectious 7 Ref [10]
1/γC The average duration of the infection of home isolated symptomatic infectious 11 Ref [10]
1/γQ The average isolated period of quarantine isolated symptomatic infectious 14 Ref [10]
1/γF The average hospital day of symptomatic infectious in Fangcang shelter hospitals 20 Ref [10]
1/γH The average hospital day of symptomatic infectious in hospitals 10 Ref [10]
αI Disease-induced death rate of symptomatic infectious estimated 0.0087 (95%CI: 0.007–0.01) Estimated
αH Disease-induced death rate of symptomatic infectious in hospitals 0.0057 (95%CI: 0.0051–0.0061) Estimated
1/δic The average day from symptom onset to clinical diagnosed after Jan 23 1 Ref [10]
1/δcfh The average day from clinical diagnosed to laboratory confirmed 1 Ref [10]
δcq The moving rate from community isolation to quarantine points isolation 0.2 (95%CI: 0.19–0.21) Estimated
ρQ The deteriorating rate from mild or moderate to severe illness in quarantine points 0.2 Ref [12]
ρF The deteriorating rate from mild or moderate to severe illness in Fangcang shelter hospitals 0.05 Ref [12]
θ The ratio of the beds used to isolate symptomatic infectious individuals in quarantine points 0.09 (95%CI: 0.08–0.11) Estimated
  1. Note: Reference: Ref