. 2020 Dec 7;6(1):e12–e20. doi: 10.1016/S2468-2667(20)30263-2

Table.

Summary of the time delay distributions used in our model and their sources

	Description	Value	Source
Incubation period	Time from exposure to onset of symptoms	Gamma (μ=5·5, σ²=6·5) distribution; median 5·1 days (95% CI 4·5–5·8), with 97·5% of symptomatic cases developing symptoms within 11·5 days	Lauer et al (2020)¹⁸
Time to infectiousness, for symptomatic cases^*	Time after exposure (and before symptom onset) from which pre-symptomatic transmission can occur	Median: 3·4 days (IQR 2·3–4·9; 95% CI 0·9–8·6)	Derived from He et al (2020)¹⁷
Infectious period, for symptomatic cases^*	Time after incubation period during which case is able to infect others	Median 7·1 days (IQR 5·7– 8·5; 95% CI 2·5–11·6)	Derived from Wölfel et al (2020)¹⁹
Hospitalisation to death	Time between being admitted to hospital and dying for severe cases	Median 13·0 days (95% CI 8·7–20·9)	Linton et al (2020)¹⁶

95% CIs are calculated using bootstrapping.

Time to infectiousness and infectious period are summed to arrive at prevalence estimates.