diff --git a/vignettes/ebola.Rmd b/vignettes/ebola.Rmd
index 06ac7b3d6..0da1d6bfe 100644
--- a/vignettes/ebola.Rmd
+++ b/vignettes/ebola.Rmd
@@ -175,22 +175,6 @@ obs_cens <- sierra_leone_ebola_data |>
   ) |>
   select(case, date_of_symptom_onset, date_of_sample_tested, age, sex, district)
 
-head(sierra_leone_ebola_data)
-```
-
-Next, we use add interval censoring columns giving the lower and upper bounds on the (daily) primary and secondary event times.
-We set the observation time to be the time of the final secondary event.
-
-```{r}
-obs_cens <- sierra_leone_ebola_data |>
-  mutate(
-    ptime_lwr = floor(.data$ptime),
-    ptime_upr = .data$ptime_lwr + 1,
-    stime_lwr = floor(.data$stime),
-    stime_upr = .data$stime_lwr + 1,
-    obs_time = ceiling(max(.data$stime))
-  )
-
 head(obs_cens)
 ```