diff --git a/module3/exo1/influenza-like-illness-analysis.ipynb b/module3/exo1/influenza-like-illness-analysis.ipynb
index 8b93b9f3633a18cd65f01d587c26345af9bdac46..e53be9188118f311f6f7426437ae08266122a4c3 100644
--- a/module3/exo1/influenza-like-illness-analysis.ipynb
+++ b/module3/exo1/influenza-like-illness-analysis.ipynb
@@ -58,6 +58,13 @@
     "The first line of the CSV file is a comment, which we ignore with `skip=1`."
    ]
   },
+  {
+   "cell_type": "markdown",
+   "metadata": {},
+   "source": [
+    "We check if the file is already downloaded and store to a local file to prevent to download every time we run the program. If it is not, we use the link and download it and save it locally."
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": 35,