Chengalpattu recorded 2,701, Tiruvallur 1,273, and Kancheepuram 831 cases on Sunday and they constitute 57.5 per cent of Tamil Nadu's cases.
He said that the analysis also showed that protective effect of vaccination 'is often scuttled by uncontrolled comorbidities', an issue that requires case-by-case analysis.
As of Wednesday, the daily cases grew to 28.47 lakh with the addition of 17,898 fresh infections while the toll climbed to 36,905 with 19 fatalities.
CM Stalin has asserted that the economy should not be affected, restricted lockdown enough for now, Subramanian said.
It was a feeling of déja vu for Chennaiites as lockdown returned on Jan 9, to contain the surge of Covid-19 cases.
The functioning of TASMAC outlets is to blame for the spike in Covid-19 cases since all other major spots of crowding are shut, said AIADMK coordinator O Panneerselvam in a statement.
Health Minister Ma Subramanian said the spike was driven by the Omicron variant, with 80-85 per cent of samples showing an ‘S’ gene drop which is a marker for the highly transmissible variant.
With Chief Minister MK Stalin expected to review the current curbs on Jan 10, a section of workers in the textile hub of Tiruppur thronged the railway station on Sunday to leave to their home states
Two weeks’ data show more non-oxygen beds in use compared to oxygenated and ICU beds
Nearly 90 per cent of those affected by Omicron have received both doses of vaccination and were asymptomatic, Ma Subramanian said.
Online booking for treatments, Outpatient (OP) visits and other non-emergency treatments and surgeries have been stopped temporarily.
The number of new Covid cases in the state jumped from 1,728 cases on Monday to 2,731 on Tuesday.
Health minister Ma Subramanian said that similar to last year's initiative by the Government to treat COVID-19 patients, a Siddha Centre to treat COVID-19 individuals was inaugurated in the city.
Stalin visited the oxygen-producing tanks installed at the Rajiv Gandhi Government General Hospital and inquired about other infrastructure facilities set up at the hospital to treat Covid patients.
Many doctors are taking booster doses from private hospitals, while some of them are taking the boosters from government hospitals themselves using the vials that remain unused.