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. 2021 Jan 7;6:324–342. doi: 10.1016/j.idm.2021.01.001

Table 3.

Key time periods setting of COVID-19 infection in the models.

Key parameters Definition Acquisition method Distribution hypothesis
Incubation period the time between infection and the onset of symptoms Based on other research’s result and reports (Acuna-Zegarra et al., 2020; Boldog et al., 2020; Eikenberry et al., 2020; Ferretti et al., 2020; Ganyani et al., 2020; Hauser et al., 2020; Hellewell et al., 2020; Hou et al., 2020; Kuniya, 2020; Ngonghala et al., 2020; Tang, Wang, et al., 2020; Tian et al., 2020; Yang et al., 2020; Shi; Zhao, Musa, et al., 2020; Zhu & Chen, 2020)
Based on the knowledge of SARS and MERS (Chinazzi & Davis, 2020; Wu et al., 2020; S. Zhao, Q. Li, Pei, et al., 2020)
Based on the knowledge of SARS (Koo et al., 2020)
Based on current epidemic data (Kraemer et al., 2020; Kucharski et al., 2020; L.; Li, Pei, et al., 2020; Q.; Li, Pei, et al., 2020; J.; Zhang, Litvinova, et al., 2020)
log-normal distribution(Ferretti et al., 2020; Q.; Li, Pei, et al., 2020; J.; Zhang, Litvinova, et al., 2020)
gamma distribution(Acuna-Zegarra et al., 2020; Boldog et al., 2020; Ganyani et al., 2020)
Erlang distribution(Kucharski et al., 2020) truncated gamma distribution (Kraemer et al., 2020)
Weibull distribution(Hellewell et al., 2020) beta-distribution(Zhu & Chen, 2020)
latent period the time between infection and start of infectiousness Based on other research’s result and reports (Sanche et al., 2020)
Equal to incubation period (Chinazzi & Davis, 2020; Kucharski et al., 2020; Wang & Liu, 2020; Zhu & Chen, 2020)
Based on current epidemic data (R. Li, Pei, et al., 2020)
gamma distributions(Sanche et al., 2020)
infectious period the time interval during which the infected individuals could transmit the disease to any susceptible contacts Based on other research’s result and reports (Boldog et al., 2020; Kuniya, 2020; L. Li, Pei, et al., 2020; Maier & Brockmann, 2020; Ngonghala et al., 2020; Sanche et al., 2020; Tian et al., 2020; Wang & Liu, 2020; Wu et al., 2020; Zhao et al., 2020, Zhao et al., 2020, Zhao et al., 2020)
Based on the knowledge of another beta-coronavirus (Kissler et al., 2020)
Based on current epidemic data (Acuna-Zegarra et al., 2020; Kucharski et al., 2020; R.; Li, Pei, et al., 2020)
Erlang distribution(Kucharski et al., 2020) gamma distribution(Boldog et al., 2020; Sanche et al., 2020)
serial interval the time from the onset of symptoms in the primary case to the onset of symptoms in the secondary case Based on other research’s result and reports (Acuna-Zegarra et al., 2020; Hellewell et al., 2020; Munayco et al., 2020; Muniz-Rodriguez et al., 2020; Sanche et al., 2020; Tang, Wang, et al., 2020)
Based on the knowledge of SARS and MERS (S. Zhao, Q. Li, Pei, et al., 2020; Zhao et al., 2020, Zhao et al., 2020, Zhao et al., 2020)
Based on the knowledge of SARS (Kissler et al., 2020; Wu et al., 2020)
Based on current epidemic data (Q. Li, Pei, et al., 2020; J. Zhang, Litvinova, et al., 2020)
gamma distribution(Tang, Wang, et al., 2020) (Acuna-Zegarra et al., 2020; Q. Li, Pei, et al., 2020; Muniz-Rodriguez et al., 2020; J. Zhang, Litvinova, et al., 2020; S. Zhao, Q. Li, Pei, et al., 2020; Zhao et al., 2020, Zhao et al., 2020, Zhao et al., 2020)
Weibull distribution(Kissler et al., 2020) skewed normal distribution(Hellewell et al., 2020)
generation time the time the onset of infectiousness in the primary case to the onset of infectiousness in the secondary case Based on other research’s result and reports (Shim et al., 2020)
Based on the knowledge of SARS and MERS (Chinazzi & Davis, 2020)
Based on current epidemic data (Ferretti et al., 2020; Ganyani et al., 2020; Tang, Wang, et al., 2020)
Weibull distribution(Ferretti et al., 2020)