R/travel_malaria-eir.R
    setup_travel_eir.RdSet up parameters and function for an eir-based travel_malaria model
setup_travel_eir(
  pars,
  travel_Opts = list(),
  frac_time_spent_traveling = 0.01,
  travel_eir_scale = 0,
  travel_eir_t = NULL
)a list
a list, overwrites default values
is the fraction of time spent travel
a non-negative numeric value to scale the mean eir experienced while traveling
the temporal pattern for eir experienced while traveling
none