diff --git a/HowBadIsMyBatch.ipynb b/HowBadIsMyBatch.ipynb
index 7e0034e032d..d298a0f5a2b 100644
--- a/HowBadIsMyBatch.ipynb
+++ b/HowBadIsMyBatch.ipynb
@@ -21,34 +21,41 @@
    "metadata": {},
    "outputs": [],
    "source": [
-    "def read_csv(file, usecols, dtype = {}):\n",
-    "    return pd.read_csv(\n",
-    "        file,\n",
-    "        index_col = 'VAERS_ID',\n",
-    "        encoding = 'latin1',\n",
-    "        low_memory = False,\n",
-    "        usecols = usecols,\n",
-    "        dtype = dtype)\n",
+    "import pandas as pd\n",
     "\n",
-    "def readVaersDescr(dataDir, year):\n",
-    "    folder = dataDir + \"/\" + year + \"VAERSData/\"\n",
-    "    return {\n",
-    "        'VAERSDATA':\n",
-    "            read_csv(\n",
-    "                folder + year + \"VAERSDATA.csv\",\n",
-    "                ['VAERS_ID', 'DIED', 'L_THREAT', 'DISABLE', 'HOSPITAL', 'ER_VISIT']),\n",
-    "        'VAERSVAX':\n",
-    "                read_csv(\n",
-    "                    folder + year + \"VAERSVAX.csv\",\n",
-    "                    ['VAERS_ID', 'VAX_DOSE_SERIES', 'VAX_TYPE', 'VAX_MANU', 'VAX_LOT'],\n",
-    "                    dtype = {\"VAX_DOSE_SERIES\": \"string\"})\n",
-    "        }\n",
+    "class VaersDescrReader:\n",
+    "    \n",
+    "    def __init__(self, dataDir):\n",
+    "        self.dataDir = dataDir        \n",
     "\n",
-    "def readVaersDescrs(dataDir, years):\n",
-    "    return [readVaersDescr(dataDir, year) for year in years]\n",
+    "    def readAllVaersDescrs(self):\n",
+    "        return self.readVaersDescrs([\"2021\", \"2022\"])\n",
+    "        \n",
+    "    def readVaersDescrs(self, years):\n",
+    "        return [self.readVaersDescr(year) for year in years]\n",
     "\n",
-    "def readAllVaersDescrs(dataDir):\n",
-    "    return readVaersDescrs(dataDir, [\"2021\", \"2022\"])"
+    "    def readVaersDescr(self, year):\n",
+    "        folder = self.dataDir + \"/\" + year + \"VAERSData/\"\n",
+    "        return {\n",
+    "            'VAERSDATA':\n",
+    "                self._read_csv(\n",
+    "                    folder + year + \"VAERSDATA.csv\",\n",
+    "                    ['VAERS_ID', 'DIED', 'L_THREAT', 'DISABLE', 'HOSPITAL', 'ER_VISIT']),\n",
+    "            'VAERSVAX':\n",
+    "                    self._read_csv(\n",
+    "                        folder + year + \"VAERSVAX.csv\",\n",
+    "                        ['VAERS_ID', 'VAX_DOSE_SERIES', 'VAX_TYPE', 'VAX_MANU', 'VAX_LOT'],\n",
+    "                        dtype = {\"VAX_DOSE_SERIES\": \"string\"})\n",
+    "            }\n",
+    "\n",
+    "    def _read_csv(self, file, usecols, dtype = {}):\n",
+    "        return pd.read_csv(\n",
+    "            file,\n",
+    "            index_col = 'VAERS_ID',\n",
+    "            encoding = 'latin1',\n",
+    "            low_memory = False,\n",
+    "            usecols = usecols,\n",
+    "            dtype = dtype)\n"
    ]
   },
   {
@@ -383,7 +390,7 @@
     "        self._test_createBatchCodeTable(\n",
     "            filterDataFrame(\n",
     "                createDataFrameFromDescrs(\n",
-    "                    readAllVaersDescrs(\"test/VAERS\")),\n",
+    "                    VaersDescrReader(\"test/VAERS\").readAllVaersDescrs()),\n",
     "                manufacturer = \"MODERNA\",\n",
     "                dose = '1'))\n",
     "\n",
@@ -484,7 +491,7 @@
     "    batchCodeTable = createBatchCodeTable(\n",
     "        filterDataFrame(\n",
     "            createDataFrameFromDescrs(\n",
-    "                readAllVaersDescrs(\"VAERS\")),\n",
+    "                VaersDescrReader(\"VAERS\").readAllVaersDescrs()),\n",
     "            manufacturer = manufacturer,\n",
     "            dose = '1'))\n",
     "    display(manufacturer, batchCodeTable)\n",
@@ -514,7 +521,7 @@
     "    severeEffectsBatchCodeTable = createSevereEffectsBatchCodeTable(\n",
     "        filterDataFrameForSevereEffects(\n",
     "            createDataFrameFromDescrs(\n",
-    "                readAllVaersDescrs(\"VAERS\")),\n",
+    "                VaersDescrReader(\"VAERS\").readAllVaersDescrs()),\n",
     "                dose = '1'))\n",
     "    display('severeEffectsBatchCodeTable', severeEffectsBatchCodeTable)\n",
     "    severeEffectsBatchCodeTable.to_excel(excelFile)"