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Tests up in Chennai, but positivity rate stable | Chennai News – Times of India

CHENNAI: While the number of fresh Covid-19 cases in Chennai is increasing steadily, official data from Greater Chennai Corporation shows that the test positivity rate (TPR) has remained between 19.3% and 21.4% for the past 10 days.
The strategy to increase testing helped GCC track people with the viral infection early, isolate them and prevent further transmission of the infection, said GCC commissioner G Prakash. The reproduction rate (R-naught) of the viral infection (no. of people who can get infected from one confirmed case), officials say, has also been hovering between 1.3 and 1.2. On Friday, the civic agency drew samples from more than 28,304 people.

On April 21, the test positivity rate (TPR) — the number of tests that turn positive for every 100 samples tested — was 20.8%. The number of fresh cases recorded in the city on April 21 was 3,750. While the new cases registered on Friday was 5,473 — a close to 50% jump — TPR on Friday was 19.3%.
GCC has also increased testing from 18,035 on April 21 to 28,304 on April 30. Around 8-10 contacts per positive case are being traced and tested, a GCC official said. Testing centres have also been publicised more and all the primary contacts of a person who tests positive, including close family members and personal attendants such as drivers and house helps are being tested.
The number of active cases has not increased in proportion to the fresh cases as the number of people who recover from Covid-19 has been increasing everyday since April 24. For instance, on April 24, 3,667 people recovered while the fresh cases were 4,086.
On April 25, recoveries was more than the fresh cases, causing a dip in active cases. The next day again, the recoveries outnumbered fresh cases by 280, which caused a further decline. On Saturday, there were 31,475 people under treatment for the viral infection in Chennai.


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