diff --git a/README.Rmd b/README.Rmd
index c7d0ae0..825348a 100644
--- a/README.Rmd
+++ b/README.Rmd
@@ -94,9 +94,9 @@ onset_to_death <- epiparameter::epidist_db(
 )
 ```
 
-To simulate a line list for COVID-19 with a Poisson contact distribution with a mean number of contacts of 2 and a probability of infection per contact of 0.5, we use the `sim_linelist()` function. As outlined in @bjornstad2020a, the mean number of contacts ($k$) and probability of infection ($\pi$) are combined into a transmission rate that, multiplied by the infectious period ($1/\gamma$), determines the outbreak reproduction number ($R_o$). If the resulting reproduction number is around one it means we will likely get a reasonably sized outbreak (10 - 1,000 cases, varying due to the stochastic simulation). 
+To simulate a line list for COVID-19 with a Poisson contact distribution with a mean number of contacts of 2 per day and a probability of infection per contact of 0.5, we use the `sim_linelist()` function. As outlined in @bjornstad2020a, the contact rate ($k$) and probability of infection on contact ($\pi$) are combined into a transmission rate that, multiplied by the infectious period ($1/\gamma$), determines the outbreak reproduction number ($R_o$). If the resulting reproduction number is around one it means we will likely get a reasonably sized outbreak (10 - 1,000 cases, varying due to the stochastic simulation). 
 
-***Warning***: the reproduction number of the simulation results from the infectious period distribution (`infectious_period`), the number of contacts distribution (`contact_distribution`) and the probability of infection (`prob_infection`); the number of infections is a binomial sample of the number of contacts for each case with the probability of infection (i.e. being sampled) given by `prob_infection`. If the average number of secondary infections from each primary case is greater than 1 then this can lead to the outbreak becoming extremely large. There is currently no depletion of susceptible individuals in the simulation model, so the maximum outbreak size (second element of the vector supplied to the `outbreak_size` argument) can be used to return a line list early without producing an excessively large data set.
+***Warning***: the reproduction number of the simulation results from the infectious period distribution (`infectious_period`), the contact rate distribution (`contact_distribution`) and the probability of infection on contact (`prob_infection`); the number of infections is a binomial sample of the number of contacts for each case with the probability of infection (i.e. being sampled) given by `prob_infection`. If the average number of secondary infections from each primary case is greater than 1 then this can lead to the outbreak becoming extremely large. There is currently no depletion of susceptible individuals in the simulation model, so the maximum outbreak size (second element of the vector supplied to the `outbreak_size` argument) can be used to return a line list early without producing an excessively large data set.
 
 ```{r sim-linelist}
 set.seed(1)