Amit Shah has come to unseat Siddaramaiah; let DKS become CM: Poojary

Bengaluru, Jun 25: A total of 442 new cases of COVID-19 were reported in Karnataka on Thursday taking the total count of cases in the state to 10,560.

According to the State Health Department, there are 3,716 active cases and 6,670 patients have been discharged after treatment. Six more deaths have been reported in the last 24 hours, taking the death toll to 170.

India's COVID-19 count reached 4,73,105 on Thursday with the highest single-day spike of 16,922 cases in the last 24 hours.

Bengaluru, Jun 14: Karnataka Medical Education Minister K Sudhakar on Sunday said there was no question of reimposition of the lockdown amid speculation that it would be done.

"The question of lockdown is not in front of us. There is such speculation as the Prime Minister is holding a video conference with all Chief Ministers on June 16 and 17.

On June 17 our state will be taking part in it at around 3 pm," Mr Sudhakar said in response to a question.

Speaking to reporters at Kalaburagi, he said the current situation would be discussed in that meeting. Mr Sudhakar said the Prime Minister has repeatedly been holding such video conferencing exercises to take stock of the situation and plan for the future.

"There will not be a lockdown anymore according to me," he added.

There has been speculation that there would be another shutdown from this month owing to a rapid rise in the number of cases.

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Mr Sudhakar had on Friday said experts have indicated a surge in COVID-19 cases in the state in August and that the government was taking all precautionary measures in that direction.

As of June 13 evening, cumulatively 6,824 COVID-19 positive cases have been confirmed in the state, which includes 81 deaths and 3,648 discharges.

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.