Refactoring: vaccination

src/flask_covid19/blueprints/data_who/templates/who/region/all/who_region_all_table.html

@@ -16,4 +16,9 @@
                         </tr>
                     {% endfor %}
                     </tbody>
+                    <tfoot>
+                        <tr>
+                            <th scope="col">who_region</th>
+                        </tr>
+                    </tfoot>
                 </table>