diff --git a/vignettes/projecting_incidence.Rmd b/vignettes/projecting_incidence.Rmd
index 65ce0bd2..9058cccd 100644
--- a/vignettes/projecting_incidence.Rmd
+++ b/vignettes/projecting_incidence.Rmd
@@ -94,11 +94,11 @@ t0
 
 ### Generation time
 
-In epidemiology, the generation time (also called the generation interval) is the duration between successive
-infectious events in a chain of transmission. Similarly, the serial
-interval is the duration between observed symptom onset times between
-successive cases in a transmission chain. The generation interval is
-often hard to observe because exact times of infection are hard to
+In epidemiology, the generation time (also called the generation interval) is
+the duration between successive infectious events in a chain of transmission.
+Similarly, the serial interval is the duration between observed symptom onset
+times between successive cases in a transmission chain. The generation
+interval is often hard to observe because exact times of infection are hard to
 measure hence, the serial interval is often used instead. Here, we
 use the serial interval and interpret the simulated case data to represent
 symptom onset.