diff --git a/src/VaersDescrReader.py b/src/VaersDescrReader.py
index dcc4c5c3e98..dccec6cb496 100644
--- a/src/VaersDescrReader.py
+++ b/src/VaersDescrReader.py
@@ -31,7 +31,11 @@ class VaersDescrReader:
         return self._read_csv(
             file = file,
             usecols = ['VAERS_ID', 'VAX_DOSE_SERIES', 'VAX_TYPE', 'VAX_MANU', 'VAX_LOT'],
-            dtype = {"VAX_DOSE_SERIES": "string"})
+            dtype =
+                {
+                    "VAX_DOSE_SERIES": "string",
+                    "VAX_LOT": "string"
+                })
 
     def _read_csv(self, file, **kwargs):
         return pd.read_csv(
diff --git a/src/VaersDescrReaderTest.py b/src/VaersDescrReaderTest.py
index 53fe966157a..a157a777325 100644
--- a/src/VaersDescrReaderTest.py
+++ b/src/VaersDescrReaderTest.py
@@ -15,11 +15,21 @@ class VaersDescrReaderTest(unittest.TestCase):
         vaersDescr = vaersDescrReader.readVaersDescrForYear(2023)
 
         # Then
-        RECVDATE = pd.to_datetime('01/01/2023', format = "%m/%d/%Y")
-        dataFrameExpected = TestHelper.createDataFrame(
-            columns = ['RECVDATE', 'DIED', 'L_THREAT', 'ER_VISIT', 'HOSPITAL', 'DISABLE', 'SPLTTYPE'],
-            data = [  [RECVDATE,   np.nan,  np.nan,    np.nan,     np.nan,     np.nan,    np.nan]],
-            index = pd.Index(
-                    name = 'VAERS_ID',
-                    data=[2547730]))
-        assert_frame_equal(vaersDescr['VAERSDATA'], dataFrameExpected, check_dtype=False)
+        assert_frame_equal(
+                vaersDescr['VAERSDATA'],
+                TestHelper.createDataFrame(
+                    columns = ['RECVDATE',                                          'DIED', 'L_THREAT', 'ER_VISIT', 'HOSPITAL', 'DISABLE', 'SPLTTYPE'],
+                    data = [  [pd.to_datetime('01/01/2023', format = "%m/%d/%Y"),   np.nan,  np.nan,    np.nan,     np.nan,     np.nan,    np.nan]],
+                    index = pd.Index(
+                            name = 'VAERS_ID',
+                            data=[2547730])),
+                check_dtype = False)
+        assert_frame_equal(
+                vaersDescr['VAERSVAX'],
+                TestHelper.createDataFrame(
+                    columns = ['VAX_TYPE', 'VAX_MANU', 'VAX_LOT', 'VAX_DOSE_SERIES'],
+                    data = [  ['COVID19',  'JANSSEN',  '1808982', 'UNK']],
+                    index = pd.Index(
+                            name = 'VAERS_ID',
+                            data=[2547730])),
+                check_dtype = False)