<span style="color: #222222;">Health authorities in Kerala have stepped up efforts to contain the spread of Norovirus, after two children of class one and two belonging to a school in Ernakulam district tested positive.<br />''<br />''About 62 children and a few parents exhibited symptoms of the infection, after which samples were sent to the State Public Laboratory for testing. Three students are under treatment and their condition is said to be stable.<br />''<br />''The school authorities have suspended regular classes as a temporary measure, however classes will be held online. Health Department officials have disinfected classrooms and water samples have been collected and sent for detailed analysis.<br />''<br />''Norovirus is highly contagious and causes diarrhea and vomiting affecting people of all ages. </span><br />