Force of Infection, \(h_\tau(a)\)

Given a birth day, \(\tau,\) age is related to time by the formula \(t = a+\tau\). The FoI is computed as $$\bar h \; \omega(a) S(a+\tau) T(a+\tau)$$

FoI(a, FoIpar, tau = 0)

Arguments

a

host age

FoIpar

a compound list to compute \(h_\tau(a)\)

tau

the host cohort's birthday

Value

numeric