“We have started this effort a week ago,” he said, adding that mortality rate would come down by 0.2 to 0.3 per cent through this effort. The Commissioner said positivity rate has come down from 37 per cent in June to about 9.5-11 per cent with the multi-fold increase in the testing. “We were testing 4,000 to 5,000 persons before June 15. But it was scaled up to 14,000. On an average, we are testing 12,000 persons a day,” he noted.