make_figure_4: Construct Figure 4 from the manuscript
In emmalouisedavis/TTI-branching-process: TTI COVID-19 branching process model

Construct Figure 4 from the manuscript

make_figure_4(
  res = NULL,
  num.initial.cases_val = 5,
  delay_val = "SARS",
  prop.asym_val = 0.4,
  index_R0_val = 1.1
)

`res`	The results dataframe from parameter sweep and then calculating extinction.
`num.initial.cases_val`	Value for num.initial.cases to subset the data to.
`delay_val`	Value for delay type to subset the data to.
`prop.asym_val`	Value for prop.asym to subset the data to.
`index_R0_val`	Value of index_R0 to subset the data to.