FoI.Rd
Given a birth day, τ, age is related to time by the formula t=a+τ. The FoI is computed as ˉhω(a)S(a+τ)T(a+τ)
FoI(a, FoIpar, tau = 0)
host age
a compound list to compute hτ(a)
the host cohort's birthday
numeric