MCMC.date               Convert dates to a list of extendend natural
                        numbers.
community.attack.rate   Compute the community attack rate
hh.transmission         Simulated data under the SIR.
hh.transmission.epsilon
                        Simulated data under SIR, with covariates.
household.transmission
                        Estimate parameters from SIR model
prior                   Compute prior probability of parameters
secondary.attack.rate   Compute the secondary attack rate
unifprior               A uniform prior on the model parameters
