diff --git a/HowBadIsMyBatch.ipynb b/HowBadIsMyBatch.ipynb
index 936d2325370..f4b55ffb574 100644
--- a/HowBadIsMyBatch.ipynb
+++ b/HowBadIsMyBatch.ipynb
@@ -21,21 +21,23 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def createDataFrameFromDescrs(vaersDescrs, manufacturer, dose):\n",
+    "def createDataFrameFromDescr(vaersDescr, manufacturer, dose):\n",
     "    def filter(df):\n",
     "        return df[\n",
     "            (df[\"VAX_TYPE\"] == \"COVID19\") &\n",
     "            (df[\"VAX_MANU\"] == manufacturer) &\n",
     "            (df[\"VAX_DOSE_SERIES\"].str.contains(dose))]\n",
+    "    \n",
+    "    return pd.merge(\n",
+    "        vaersDescr['VAERSDATA'],\n",
+    "        filter(vaersDescr['VAERSVAX']),\n",
+    "        left_index = True,\n",
+    "        right_index = True)\n",
     "\n",
-    "    def vaersDescr2DataFrame(vaersDescr):\n",
-    "        return pd.merge(\n",
-    "            vaersDescr['VAERSDATA'],\n",
-    "            filter(vaersDescr['VAERSVAX']),\n",
-    "            left_index = True,\n",
-    "            right_index = True)\n",
-    "\n",
-    "    return pd.concat(map(vaersDescr2DataFrame, vaersDescrs))\n"
+    "def createDataFrameFromDescrs(vaersDescrs, manufacturer, dose):\n",
+    "    _createDataFrameFromDescr = lambda vaersDescr: createDataFrameFromDescr(vaersDescr, manufacturer, dose)\n",
+    "    dataFrames = map(_createDataFrameFromDescr, vaersDescrs)\n",
+    "    return pd.concat(dataFrames)\n"
    ]
   },
   {