diff --git a/module3/exo1/influenza-like-illness-analysis.Rmd b/module3/exo1/influenza-like-illness-analysis.Rmd
index 254cd7952d32b5800d4d0b611db098a7ccf0411d..241cd1cafd11b53945d135ee2c195c740619bd5a 100644
--- a/module3/exo1/influenza-like-illness-analysis.Rmd
+++ b/module3/exo1/influenza-like-illness-analysis.Rmd
@@ -28,6 +28,8 @@ data_url = "http://www.sentiweb.fr/datasets/incidence-PAY-3.csv"
 ```
 
 ```{r}
+#The idea if to have a local backup of the file, in the case of the website being down or cease to exist.
+
 data_csv = "grippal.csv"	
 if (!file.exists(data_csv)) {	
     download.file(data_url, data_csv, method="auto")