In a positive development in Chennai, the doubling rate of COVID-19 infection has increased to 47 days. The city Corporation Commissioner Prakash said, it is considered a significant feat in the fight against the pandemic. <br />''<br />''Talking to reporters today in Chennai, he said, the once worst affected Royapuram Zone in the city has achieved a doubling rate of 97 days. He said, the city is well-prepared to go for the next phase of unlock whenever it is announced.<br />''<br />''AIR Correspondent reports, Chennai since long remains the city with the most COVID-19 caseload in Tamil Nadu. However, the Corporation Commissioner Prakash says he is highly confident to face the next phase of the 'Unlock' whenever it comes, thanks to the remarkable improvements in crucial parameters relating to the control of the pandemic. <br />''<br />''The positivity of the infection has come down from as high as 12 days in the recent past to as low as eight days, which he says will be very soon brought under five days, the base level possible as of now. <br />''<br />''<span style="color: #222222;">He credits the development to the duty conscious public, effective interventions like door-to-door surveillance, fever clinics, increased testing and relentless efforts of the doctors, nurses, paramedics, police and all other field staff.</span>