diff --git a/module3/exo1/analyse-syndrome-grippal.Rmd b/module3/exo1/analyse-syndrome-grippal.Rmd
index 84e1ea346d8cef66410a3533819f5637161c191d..3dfc307e4d0d922e7ad2114cc3e0a4e3ffd94e26 100644
--- a/module3/exo1/analyse-syndrome-grippal.Rmd
+++ b/module3/exo1/analyse-syndrome-grippal.Rmd
@@ -27,7 +27,11 @@ data_url = "http://www.sentiweb.fr/datasets/incidence-PAY-3.csv"
 ```
 
 ```{r}
-data_file = incidence-PAY-3.csv
+data_file ="incidence-PAY-3.csv"
+	
+if (!file.exists(data_file)) {	
+    download.file(data_url, data_file, method="auto")	
+}
 
 ```