Ahead of general election, possibility of communal violence in India: US spymaster

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.

New Delhi, Apr 6: Prime Minister Narendra Modi on Monday said India's efforts to combat coronavirus have set an example and it is among countries which understood the pandemic's seriousness and took various timely decisions to combat the virus.

Addressing BJP workers to mark the 40th foundation day of the party, he also appreciated the maturity shown by people during the lockdown, describing it as  unprecedented.

"We got to see our collective strength on Sunday evening," he said referring to the countrywide exercise to switch off lights and illuminate diyas for nine minutes to show India's collective strength to fight the deadly virus.

He also urged BJP workers to follow a five-point agenda, including working to ensure that no poor goes hungry.

He asked them to follow the guidelines issued by party president J P Nadda.

Fight against coronavirus is no less than war, Modi said, asking BJP workers to donate and encourage others to contribute to the PM-CARES fund.

Financially troubled Yes Bank on Saturday reported a standalone net loss of ₹ 18,560.31 crore for the third quarter of the financial year 2019-20. This is amongst the biggest losses reported by the India Inc.

At present, the private lender is under a moratorium and is controlled by the office of the administrator appointed by the RBI.

The bank had reported a net profit of ₹1,001.85 crore during the corresponding period of the previous financial year.

Besides, the bank's total income fell to Rs 6,268.50 crore from Rs 8,849.81 crore earned during the October-December quarter of the previous fiscal.

On consolidated basis, Yes Bank reported a net loss of ₹18,564.24 crore for the December quarter from a net profit of Rs 1,000.57 crore in the corresponding period of the previous fiscal.

The independent auditor's review report on the consolidated results pointed out that there is a "material uncertainty related to going concern" of the bank.

"The said assumption of going concern is dependent upon the degree of success of the final reconstruction scheme, the quantum of capital infused into the bank and the bank's ability to stabalise its deposit balances post withdrawal of the moratorium by the RBI. Our conclusion is not modified in respect of this matter," the auditor said.

Furthermore, the bank recognised additional loans of ₹ 5,150.2 crore as NPAs and related provisioning requirements of ₹772.5 crore for the quarter ended December 31, 2019.

The bank has recognised an additional provisions of ₹15,422.0 crore in the quarter ended December 31, 2019.

Last week, the RBI placed Yes Bank under moratorium and capped the withdrawal limit at ₹50,000 till next Wednesday.

Additionally, the central bank also superseded Yes Bank's board of directors and appointed former SBI CFO Prashant Kumar as its administrator.

Meanwhile, Kumar has been appointed as the new Chief Executive Officer of the financially troubled lender. He will take over his new responsibilities once the moratorium on the stressed lender is lifted on Wednesday.

Apart from Kumar, Sunil Mehta, former non-executive Chairman of Punjab National Bank, will take over as the non-executive Chairman of Yes Bank.

Other board members include Mahesh Krishnamurthy and Atul Bheda, both as non-executive Directors.

Additionally, six private lenders have joined the SBI to rescue Yes Bank with Federal Bank committing ₹300 crore by subscribing to 30 crore shares of ₹2 each at a premium of ₹8 per equity share.

The six private lenders have now committed an investment of ₹3,700 crore in the cash-strapped private sector bank.

On Friday, ICICI Bank and Housing Development Finance Corporation (HDFC) Ltd had announced that they will be investing ₹1,000 crore each in Yes Bank's equity. Axis Bank and Kotak Mahindra Bank will be investing ₹ 600 crore and ₹500 crore, respectively, while Bandhan Bank will invest ₹300 crore.

The SBI board has already approved up to 49 per cent stake purchase in Yes Bank, as per the RBI's reconstruction scheme for the lender. It had said on Thursday that an investment of ₹7,250 crore would be made in Yes Bank to pick up₹ 725 crore equity shares.