age_bins = [0 15 25 35 45 55 inf]
monthly_HIV_prob = [0 0.0008686 0.0005762 0.0003634 0.0003580 0.0003409]

See Jeanette's hiv_incidence_parameters.Rmd/html for details

• to do: put in age bins for contraception to address the newborn spike after 15 years

Individual-level characteristic enum;

Code to add/edit:

• prob(hiv_pos) - like a RR - in update_infections, it will be a multiplier
• update_PrEP - look at update_art for decision rules(Horacio's code)
  • 1) alive and not already on PrEP
  • 2) chance of being selected for PrEP
  • 3) "perform" an HIV test (this is important for counting costs)
  • 4) if negative, start PrEP