diff --git a/HowBadIsMyBatch.ipynb b/HowBadIsMyBatch.ipynb
index 40826e595cc..4a32c89c7e9 100644
--- a/HowBadIsMyBatch.ipynb
+++ b/HowBadIsMyBatch.ipynb
@@ -36,19 +36,19 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def read_csv(file, usecols):\n",
-    "    return pd.read_csv(file, index_col = 'VAERS_ID', encoding = 'latin1', low_memory = False, usecols = usecols)\n",
-    "\n",
-    "def readVaersDescr(dataDir, year):\n",
-    "    folder = dataDir + \"/\" + year + \"VAERSData/\"\n",
-    "    return {\n",
-    "        'VAERSDATA': read_csv(folder + year + \"VAERSDATA.csv\", ['VAERS_ID', 'DIED', 'L_THREAT', 'DISABLE']),\n",
-    "        'VAERSVAX': read_csv(folder + year + \"VAERSVAX.csv\", ['VAERS_ID', 'VAX_TYPE', 'VAX_MANU', 'VAX_LOT'])\n",
-    "        }\n",
-    "\n",
     "def createDataFrame(dataDir, manufacturer):\n",
+    "    def readVaersDescr(year):\n",
+    "        def read_csv(file, usecols):\n",
+    "            return pd.read_csv(file, index_col = 'VAERS_ID', encoding = 'latin1', low_memory = False, usecols = usecols)\n",
+    "\n",
+    "        folder = dataDir + \"/\" + year + \"VAERSData/\"\n",
+    "        return {\n",
+    "            'VAERSDATA': read_csv(folder + year + \"VAERSDATA.csv\", ['VAERS_ID', 'DIED', 'L_THREAT', 'DISABLE']),\n",
+    "            'VAERSVAX': read_csv(folder + year + \"VAERSVAX.csv\", ['VAERS_ID', 'VAX_TYPE', 'VAX_MANU', 'VAX_LOT'])\n",
+    "            }\n",
+    "\n",
     "    return _createDataFrame(\n",
-    "        [readVaersDescr(dataDir, \"2021\"), readVaersDescr(dataDir, \"2022\")],\n",
+    "        [readVaersDescr(\"2021\"), readVaersDescr(\"2022\")],\n",
     "        manufacturer)"
    ]
   },