generate_imported_infections: Adds imported infections to simulation
In bcgov/epi.branch.sim: Simulates an Epidemic Outbreak with a Branching Process

Description Usage Arguments Details Value

View source: R/generate_new_infections.R

The number of imported infections may be a deterministic or stochastic value.

1	generate_imported_infections(sim_params, sim_status)

`sim_params`	`sim_params` object (a list) containing simulation parameters
`sim_status`	`sim_status` object (a list) containing simulation state vector

The list object sim_params$import_params determines how imported cases are added to the simulation. The following import types are supported, which is chosen by sim_params$import_params$type:

type="None" or "none": No cases are imported.
type="constant": Each day, the number of imported cases is equal to a constant value, set by sim_params$import_params$rate.
type="constant_two_phase": Same as the above, but with two possible constant values. For times prior to sim_params$import_params$delay, the rate is sim_params$import_params$rate1. After this time, the rate is sim_params$import_params$rate2.
type="daily_constant": Each day, the number of imported cases is given by a vector defined by sim_params$import_params$rate, which should have length equal to the number of days in the simulation.
type="poisson": Each day, the number of imported cases is drawn from a Poisson distribution with mean set by sim_params$import_params$rate.
type="daily_risk": Each day, the number of imported cases is drawn from a Poisson distribution with mean equal to the daily risk. The daily risk is given by a vector defined by sim_params$import_params$risk, which should have length equal to the number of days in the simulation.

A list containing

n_imported_infections - Integer with number of imported cases at this time step.
import_source - String describing the source of these new cases. This information will be recorded in state_df and record_df. For now, this will always be "imported".