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Table 4 Nomenclature

From: Decision-based interactive model to determine re-opening conditions of a large university campus in Belgium during the first COVID-19 wave

Symbols

Signification

n

Index of time step

State variables

Un, En, An

Number of individuals in the active transmission layer of the tested population (Uninfected, Exposed, Asymptomatic)

sn, en, in

Number of individuals in the active transmission layer of the large-scale model (susceptible, exposed, infectious)

Fn, Tn, Sn

Number of individuals in the isolation layer of the tested population (False positive, True positive, Symptomatic)

Rn, Dn

Number of individuals in the removed layer of the tested population (Recovered, Dead)

rn

Number of individuals in the removed layer of the tested population

Parameters of the University model

nU

Population size [individuals]

 Se, Sp

Test sensitivity and specificity

 β

Transmission rate (Asymptomatic → Uninfected) [day−1]

 τ

Testing rate [day−1]

fp

Percentage of participation to testing [−]

 μ

Rate of return to testing pool after isolation [day− 1]

 θ

Incubation rate [day−1]

 σ

Rate of symptom development [day−1]

 ρ

Recovery rate [day−1]

 δ

Death rate [day−1]

Parameters of the external population model

nE

Population size [individuals]

 b

Transmission rate (infectious → susceptible) [day−1]

 q

Incubation rate [day−1]

 r

Recovery + symptom development rate [day−1]

Coupling between the two populations

 κ, k

Cross-transmission rates [day−1]