diff --git a/src/HowBadIsMyBatch.ipynb b/src/HowBadIsMyBatch.ipynb
index 51903cb0a4f..f92e4a1bf6e 100644
--- a/src/HowBadIsMyBatch.ipynb
+++ b/src/HowBadIsMyBatch.ipynb
@@ -433,6 +433,8 @@
    "outputs": [],
    "source": [
     "from SymptomsCausedByVaccines.HtmlUpdater import updateHtmlFile\n",
+    "from SymptomsCausedByVaccines.PrrByVaccineBySymptomFactory import PrrByVaccineBySymptomFactory\n",
+    "from SymptomsCausedByVaccines.PrrByVaccineBySymptomTransformer import PrrByVaccineBySymptomTransformer\n",
     "import pandas as pd"
    ]
   },
@@ -450,6 +452,38 @@
     "prrByVaccineAndSymptom"
    ]
   },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "640868c7",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prrByVaccineBySymptom = PrrByVaccineBySymptomFactory.getPrrByVaccineBySymptom(prrByVaccineAndSymptom)\n",
+    "prrByVaccineBySymptom"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "760ac423",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prrByVaccineBySymptomWithoutZeroPrrs = PrrByVaccineBySymptomTransformer.removeNonZeroPrrs(prrByVaccineBySymptom)\n",
+    "prrByVaccineBySymptomWithoutZeroPrrs"
+   ]
+  },
+  {
+   "cell_type": "code",
+   "execution_count": null,
+   "id": "d863007f",
+   "metadata": {},
+   "outputs": [],
+   "source": [
+    "prrByVaccineBySymptomWithoutZeroPrrs.to_excel('tmp/prrByVaccineBySymptomWithoutZeroPrrs.xlsx')"
+   ]
+  },
   {
    "cell_type": "code",
    "execution_count": null,
diff --git a/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformer.py b/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformer.py
new file mode 100644
index 00000000000..72ab0654c43
--- /dev/null
+++ b/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformer.py
@@ -0,0 +1,6 @@
+class PrrByVaccineBySymptomTransformer:
+
+    @staticmethod
+    def removeNonZeroPrrs(prrByVaccineBySymptom):
+        return prrByVaccineBySymptom.map(
+            lambda prrByVaccine: {vaccine: prr for vaccine, prr in prrByVaccine.items() if prr != 0})
diff --git a/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformerTest.py b/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformerTest.py
new file mode 100644
index 00000000000..d500904acd8
--- /dev/null
+++ b/src/SymptomsCausedByVaccines/PrrByVaccineBySymptomTransformerTest.py
@@ -0,0 +1,26 @@
+import unittest
+from pandas.testing import assert_series_equal
+import pandas as pd
+from SymptomsCausedByVaccines.PrrByVaccineBySymptomTransformer import PrrByVaccineBySymptomTransformer
+
+class PrrByVaccineBySymptomTransformerTest(unittest.TestCase):
+
+    def test_filterByNonZeroPrrs(self):
+        # Given
+        prrByVaccineBySymptom = pd.Series(
+                {
+                    '11-beta-hydroxylase deficiency': {'6VAX-F': 0.0, 'ADEN': 0.3},
+                    '17-hydroxyprogesterone': {'6VAX-F': 1.5, 'ADEN': 0.0}
+                })
+        
+        # When
+        prrByVaccineBySymptomWithoutZeroPrrs = PrrByVaccineBySymptomTransformer.removeNonZeroPrrs(prrByVaccineBySymptom)
+        
+        # Then
+        assert_series_equal(
+            prrByVaccineBySymptomWithoutZeroPrrs,
+            pd.Series(
+                {
+                    '11-beta-hydroxylase deficiency': {'ADEN': 0.3},
+                    '17-hydroxyprogesterone': {'6VAX-F': 1.5}
+                }))