Table 4 List of the model stochastic transitions and their rates
From: The role of hand hygiene in controlling norovirus spread in nursing homes
Events | Transitions | Rates |
|---|---|---|
1- Resident admission to the NH | S R → S R + 1 | μ × N R |
2- Susceptible resident discharge out of the NH (or death) | S R → S R − 1 | μ × S R |
3- Susceptible resident exposed to the virus | S R → S R − 1 & E R → E R + 1 | ⋋ R = p × [(1-h RR ) × C RR ×(I R + α × E R + α × A R ) + (1-h SR ) × C SR ×(I S + α × E S + α × A S )] |
4- Exposed resident discharge out of the NH (or death) | E R → E R -1 | μ × E R |
5- Start of symptoms in exposed residents | E R → E R -1 & I R → I R + 1 | ∈ × E R |
6- Infected symptomatic resident discharge out of the NH (or death) | I R → I R -1 | μ × I R |
7- Asymptomatic resident discharge out of the NH (or death) | A R → A R -1 | μ × A R |
8- End of symptoms in residents | I R → I R -1 & A R → A R + 1 | σ × I R |
9- Recovery of an asymptomatic resident | A R → A R -1 & R R → R R + 1 | ρ × A R |
10- Recovered resident discharge out of the NH (or death) | R R → R R -1 | μ × R R |
11- Immunity loss of a resident | R R → R R -1 & S R → S R + 1 | θ × R R |
12- Susceptible staff member exposed to the virus | S S → S S -1 & E S → E S + 1 | ⋋ S = p × [(1-h SS ) × C SS ×(I S + α × E S + α × A S ) + (1-h SR ) × C SR ×(I R + α × E R + α × A R )] |
13- Start of symptoms in exposed staff members | Ep → E S -1 & Ip → I S + 1 | ∈ × E S |
14- End of symptoms in staff members | I S → I S -1 & A S → A S + 1 | σ × I S |
15- Recovery of an asymptomatic staff member | A S → A S -1 & R S → R S + 1 | ρ × A S |
16- Immunity loss of a staff member | R S → R S -1 & S S → S S + 1 | θ × R S |