Calculate the posterior probability of freedom from the prior and
the sensitivity of the system
Usage
post_fr(prior_fr, Se)
Arguments
prior_fr
The prior probability of freedom
Se
The sensitivity of the surveillance system
Value
A vector
Details
The prior probability of freedom at the beginning of the
surveillance initiative is a value that is based on some external
evidence. Often 0.5 is used as a conservative estimate of the
probability that the population is free from the disease. For
subsequent time intervals in the surveillance system, the prior
year's posterior probability of freedom is used (plus a risk of
introduction) as the prior probability in this calculation.
# NOT RUN {## Calculate the posterior probability of freedom after applying a#sensitivity to a prior probability of freedom:post_pf <- post_fr(0.5, 0.4)
# }