Table 5 Parameters used in calculating the force of infection
From: Estimating disease burden of a potential A(H7N9) pandemic influenza outbreak in the United States
Parameter | Description |
|---|---|
I k | 1 if infected and 0 otherwise |
β h | household transmission parameter |
\( {\beta}_p^j \) | place transmission parameter |
β c | community transmission parameter |
κ(t − τ k ) | infectiousness at time (t − τ k ) since infection |
\( {\psi}_p^j\left(t-{\tau}_k\right) \) | factor by which within-place contact rates change for symptomatic severe infection (reflecting sickness-induced absenteeism) |
f(d i , k) | a function of distance d i,k between individuals i and k |
ζ(a i ) | relative travel-related contact rate of an individual of age a i |
ρ k | relative infectiousness of individual k |
C k | 1 if infection is severe, 0 for mild (asymptomatic) |
ω | 2, infectiousness of a severe infection relative to a mild one |
\( {n}_i^{\alpha } \) | number of people in the household of individual i |
α | power that determines the scaling of household transmission rates with household size |
\( {m}_i^j \) | number of people in the place type j |