The study on 2,586 hospitalised Covid-19 patients has been published in Molecular and Cellular Biochemistry, Springer Nature journal, the hospital authorities said in a statement.
Virologists in India say it may not be correct to completely dismiss the possibility of spread by asymptomatic patients.
The Karnataka government has withdrawn a circular which required government and private hospitals to set aside a specified number of beds for Covid-19, SARI and ILI treatment.
Corporation officials in Perungudi said very few patients had expressed willingness to vote.
More beds now being allocated to non-Covid cases in govt hospitals
The state is primarily concentrating on two categories: One, those with mental illness contracting Covid-19 infection severe enough to warrant in-patient care.
For instance, 315 patients have been admitted for the past seven days, while 94 patients have been admitted for 8-14 days, 39 people for 15-21 days and seven people for more than 21 days.
District Collector S Karmegam ordered inquiry into allegations that some health department staff were sharing details of Covid-19 patients with private hospitals.
State government has decided to appoint additional staff in the health department to ease the burden.
Barred from referring Covid patients to other pvt or govt med establishments without taking proper measures
The contagious and sickening nature of the Omicron variant makes it very difficult for infected persons to cook and even shop for food safely.
The government has employed hundreds of professionally-trained Yoga instructors to teach yoga to 40,000 people.
Significantly, the protocol, revised after seven months, takes vaccination status of patients into consideration for triage.
The State has so far administered single dose to around 81 per cent and double dose to 40 per cent of its targeted 3.25 crore population.
After a devastating blaze at a COVID-19 hospital in Nashik earlier this year, a fire audit had been carried out at this hospital.