Function beta.ab() returns parameters alpha and beta for generating beta r.v. (per dose)
beta.ab(m, v)mean efficacies for given dose. Values range from 0 - 100. (e.g, T cell persistence - values b/w 5 and 80 per cent)
efficacy variance per dose. Values range from 0 - 1. (e.g., 0.01)
Vector of alpha and beta values for generating beta random variable for a dose.