diff --git a/module3/exo1/influenza-like-illness-analysis.Rmd b/module3/exo1/influenza-like-illness-analysis.Rmd
index a16421f19e362afc68640f1984cdefb443580cd1..ae68e7d79832539fa05c03aa50b5da3470b68497 100644
--- a/module3/exo1/influenza-like-illness-analysis.Rmd
+++ b/module3/exo1/influenza-like-illness-analysis.Rmd
@@ -25,6 +25,7 @@ The data on the incidence of influenza-like illness are available from the Web s
 ```{r}
 data_url = "http://www.sentiweb.fr/datasets/incidence-PAY-3.csv"
 ```
+If the local file does not exist, download the data and put them into the local file
 ```{r}	
 data_file = "syndrome-grippal.csv"	
 if (!file.exists(data_file)) {