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
