Samples the serial interval for given incubation period samples
inf_fn(inc_samp = NULL, k = NULL)
a numeric
vector of equal length to the vector input to inc_samp
inf_fn(inc_samp = c(1, 2, 3, 4, 1), k = 2)
#> [1] 3.956523 3.745535 4.429854 3.655161 2.492105