In Chennai, 68 of the police personnel who recovered from Covid-19 returned to duty today.<br />'' <br />''They resumed their duty as frontline warriors after the mandatory quarantine period.<br />'' <br />''They were welcomed by the city police commissioner Mahesh Kumar Agarwal and other senior officials.<br />'' <br />''In Chennai, 1616 police personnel were infected with the virus so far and 1188 of them have reported back to work after recovery.<br />'' <br />''In Tamil Nadu, several districts outside Chennai are witnessing a surge in the new cases of Covid-19.<br />'' <br />''However, the state health department says constant efforts are being taken to keep the disease spread under check.<br />'' <br />''AIR correspondent reports, a cursory look at the age-wise breakup of the Covid-19 infection in Tamil Nadu gives an interesting account.<br />'' <br />''Nearly 83 per cent of the infection is among the people of working age group and adolescent youth, ranging from the ages of 13 to 60, as they move out often.<br />'' <br />''The senior citizens of 60 age come a distant second, contributing to a little over 12 per cent.<br />'' <br />''The remaining five percent is being reported from among the children of age from 0 to 12.<br />'' <br />''However, the mortality among children is almost nil, while the fatalities among the senior citizens in percentage terms are rather high.<br />'' <br />''The graph shows the mortality rate and age are in direct proportion. Therefore, the health department takes additional precautions in the cases of senior citizens. <br />