<span style="color: #222222;">The discharge ratio of COVID-19 affected people in Tamil Nadu has improved to nearly 55 per cent. 637 infected people today went back home after cure. </span><br />'' <br />'' <span style="color: #222222;">However, the number of COVID-19 affected people has crossed nineteen thousand in the state while the figure is reaching nearly 13-thousand in Chennai alone. The total deaths due to COVID-19 has gone up to 145 in the state with 12 people succumbing to the disease today.<br />'' <br />'' A positive aspect in the clinical side of the Covid-19 pandemic is that the trial of the convalescent plasma therapy tested in seven patients in Chennai has proved very effective, as said by the state health minister Dr Vijayabhaskar. </span><br />'' <br />'' <span style="color: #222222;">The therapy involves using the blood plasma drawn from the discharged people in the patients who are currently under treatment. He told reporters in Chennai today, the solidarity trial for Covid-19 treatment with the broad spectrum anti-viral medicine remdesivir has also given promising results. </span><br />'' <br />'' <span style="color: #222222;">He reiterated that the increased number of Covid-19 positive cases every day in the state is a reflection of the increased number of tests. He pointed out that 10,548 patients have been discharged so far including 643 with severe co-morbidity conditions and 230 expectant mothers.</span><br />''