diff --git a/.gitlab-ci.yml b/.gitlab-ci.yml
index f13052d9266..58294686337 100644
--- a/.gitlab-ci.yml
+++ b/.gitlab-ci.yml
@@ -151,16 +151,21 @@ deploy_to_reliability_env:
   needs:
     - save_versions
 
+# Currently, the job is implemented with polling mechanism.
+#
+# Due to the constraints of Github workflow dispatch endpoint, it does not return the workflow run id.
+# https://docs.github.com/en/rest/actions/workflows?apiVersion=2022-11-28#create-a-workflow-dispatch-event
+#
+# We fetch the latest workflow run from vaccine after 5 seconds of the dispatch event.
+# False positive/negative result can happen when multiple requests are made within the same window.
+#
+# TODO:
+# Replace polling implementation with reporting status to Github with Github App. This will allow us
+# to get a deterministic result without mismatched workflow run id.
 vaccine:
   image: $DOCKER_REGISTRY/docker:20.10.13
   tags: [ "arch:amd64" ]
   stage: vaccine
   needs: [create-multiarch-lib-injection-image]
   script: |
-    GH_VACCINE_PAT=$(vault kv get -field=vaccine-token kv/k8s/gitlab-runner/dd-trace-rb/github-token)
-
-    curl -X POST \
-      -H "Accept: application/vnd.github.v3+json" \
-      -H "Authorization: token $GH_VACCINE_PAT" \
-      https://api.github.com/repos/TonyCTHsu/vaccine/actions/workflows/vaccine.yml/dispatches \
-      -d '{"ref":"master", "inputs": {"commit_sha": "'$CI_COMMIT_SHA'"}}'
+    .gitlab/scripts/vaccine.sh
diff --git a/.gitlab/scripts/vaccine.sh b/.gitlab/scripts/vaccine.sh
new file mode 100755
index 00000000000..306e6178b7f
--- /dev/null
+++ b/.gitlab/scripts/vaccine.sh
@@ -0,0 +1,88 @@
+#!/bin/bash
+
+set -e
+
+GH_VACCINE_PAT=$(vault kv get -field=vaccine-token kv/k8s/gitlab-runner/dd-trace-rb/github-token)
+REPO="TonyCTHsu/vaccine" # To be migrated
+POLL_INTERVAL=60  # seconds
+
+# Trigger workflow
+echo "Triggering workflow..."
+TRIGGER_RESPONSE=$(curl -X POST \
+  -H "Accept: application/vnd.github.v3+json" \
+  -H "Authorization: token $GH_VACCINE_PAT" \
+  -w "\n%{http_code}" \
+  "https://api.github.com/repos/$REPO/actions/workflows/vaccine.yml/dispatches" \
+  -d '{"ref":"master", "inputs": {"commit_sha": "'$CI_COMMIT_SHA'"}}' 2>&1)
+
+HTTP_STATUS=$(echo "$TRIGGER_RESPONSE" | tail -n1)
+if [ "$HTTP_STATUS" -ne 204 ]; then
+  echo "Error: Workflow trigger failed with status $HTTP_STATUS"
+  echo "Response: $(echo "$TRIGGER_RESPONSE" | sed '$ d')"
+  exit 1
+fi
+
+echo "Successfully triggered workflow. Waiting for workflow to start..."
+sleep 5  # Give GitHub a moment to create the workflow run
+
+# Get the most recent workflow run
+echo "Fetching most recent workflow run..."
+RUNS_RESPONSE=$(curl -s \
+  -H "Accept: application/vnd.github.v3+json" \
+  -H "Authorization: token $GH_VACCINE_PAT" \
+  -w "\n%{http_code}" \
+  "https://api.github.com/repos/$REPO/actions/runs?event=workflow_dispatch&per_page=1" 2>&1)
+
+HTTP_STATUS=$(echo "$RUNS_RESPONSE" | tail -n1)
+RESPONSE_BODY=$(echo "$RUNS_RESPONSE" | sed '$ d')
+
+if [ "$HTTP_STATUS" -ne 200 ]; then
+  echo "Error: Fetching runs failed with status $HTTP_STATUS"
+  echo "Response: $RESPONSE_BODY"
+  exit 1
+fi
+
+# Get the most recent run ID
+WORKFLOW_ID=$(echo "$RESPONSE_BODY" | jq -r '.workflow_runs[0].id')
+
+if [ -z "$WORKFLOW_ID" ] || [ "$WORKFLOW_ID" = "null" ]; then
+  echo "Error: Could not find recent workflow run"
+  exit 1
+fi
+
+echo "Found workflow run ID: $WORKFLOW_ID"
+
+# Poll workflow status
+while true; do
+  RUN_RESPONSE=$(curl -s \
+    -H "Accept: application/vnd.github.v3+json" \
+    -H "Authorization: token $GH_VACCINE_PAT" \
+    -w "\n%{http_code}" \
+    "https://api.github.com/repos/$REPO/actions/runs/$WORKFLOW_ID" 2>&1)
+
+  HTTP_STATUS=$(echo "$RUN_RESPONSE" | tail -n1)
+  RESPONSE_BODY=$(echo "$RUN_RESPONSE" | sed '$ d')
+
+  if [ "$HTTP_STATUS" -ne 200 ]; then
+    echo "Error: Fetching run status failed with status $HTTP_STATUS"
+    echo "Response: $RESPONSE_BODY"
+    exit 1
+  fi
+
+  STATUS=$(echo "$RESPONSE_BODY" | jq -r .status)
+  CONCLUSION=$(echo "$RESPONSE_BODY" | jq -r .conclusion)
+
+  if [ "$STATUS" = "completed" ]; then
+    if [ "$CONCLUSION" = "success" ]; then
+      echo "✅ Workflow completed successfully!"
+      exit 0
+    else
+      echo "❌ Workflow failed with conclusion: $CONCLUSION"
+      echo "See details: https://github.com/$REPO/actions/runs/$WORKFLOW_ID"
+      exit 1
+    fi
+  fi
+
+  echo "Current status: $STATUS (Checking again in ${POLL_INTERVAL}s)"
+  sleep $POLL_INTERVAL
+done