generate_probM_forecast: Time varying microcephaly risk not aborted
In jameshay218/zikaProj: zikaInfer

Calculates the probability of a birth having microcephaly at a given time

1 2	generate_probM_forecast(riskI, probM, bp, abortion_rate, birth_reduction, switch_t, abortion_time, ABORTED)

`riskI`	the relative risk of infection over time as generated by generate_riskI
`probM`	the time varying risk of developing microcephaly given infection over the course of gestation. Time steps should be the same as riskI
`bp`	the baseline probability of microcephaly
`abortion_rate`	probability of a women having an abortion given that she was infected
`birth_reduction`	reduced probability of getting infected, synonymous with probability of avoiding pregnancy
`switch_t`	integer for index after which behaviour changes
`abortion_time`	integer for last allowable abortion day/week in gestational time
`ABORTED`	if TRUE, then return the number of aborted cases. If FALSE, return the number of not aborted cases.