numeric: location & scale parameters for background mortality,
respectively
a2, b2
numeric: location & scale parameters for mortality due to
infection, respectively
d1, d2
character: probability distributions to describe background
mortality and mortality due to infection, respectively
Value
a vector
Details
The expected average longevity is calculated as the integral
from zero to infinity for the product of the cumulative survival
functions for background mortality and mortality due to infection,
given values of a1, b1, d1, a2, b2, d2