Youth bursts cracker in 3-yr-old girl's mouth in UP

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.

Kota, Feb 26: At least 24 people died and four others sustained injuries as a private bus carrying a wedding party fell into a river on Kota–Dausa highway in Bundi district on Wednesday morning, police said.

The wedding party with 28 persons on board was headed to Sawai Madhopur from Kota early morning when the driver apparently lost balance of the bus while traversing a bridge near Papdi village under Lekhari police station limits, Lakheri Sub-Inspector Rajendra Kumar said.

The bus, subsequently, plunged into Mej river from the bridge that had no wall or railing, Kumar said.

Thirteen people died on the spot while 10 others succumbed to their injuries on way to hospital, he added.

The deaths include 11 men, 10 women and three children.

The injured were rushed to Lekhari government hospital from where the critically injured are being referred to a government hospital in Kota, the SI further said.

Most of the injured people were rescued with the help of locals in the village, he added.

Mej river is a tributary of the Chambal river in Rajasthan.

New Delhi, May 24: The Indian economy is likely to slip into recession in the third quarter of this fiscal as loss in income and jobs and cautiousness among consumers will delay recovery in consumer demand even after the pandemic, says a report.

According to Dun & Bradstreet's latest Economic Observer, the country's economic recovery will depend on the efficacy and duration of implementation of the government's stimulus package.

"The multiplier effect of the stimulus measures on the economy will depend on three key aspects i.e. the time taken for effecting the withdrawal of the lockdown, the efficacy of implementation and duration of execution of the measures announced," Dun & Bradstreet India Chief Economist Arun Singh said.

The report noted that the government's larger-than-expected stimulus package is likely to re-start economic activities.

Besides, measures taken by the Reserve Bank of India like reducing the repo rate by a further 40 basis points to 4 per cent, extending the moratorium period by three months and facilitating working capital financing will also help stimulate the momentum.

Singh said while the measures announced by the government are "positive", most of them have been directed towards strengthening the supply side of the economy, and "it is to be noted that supply needs to be matched with demand", he said.

Besides, "in the absence of cash-in-hand benefits under the government's stimulus package, demand for goods and services is expected to remain depressed", he added.

He further said the loss in income and employment opportunities, and cautiousness among consumers, will lead to a delayed recovery in consumer demand, even after the pandemic. As debt and bad loan levels increase, the banking sector might face challenges.

The report further noted that even as the monetary stimulus is expected to inject liquidity and stimulate demand for a wider section of the economy, the channelisation of funds from the financial institutions will be subjected to several constraints.

The foremost concern being increase in risk averseness, as the balance sheets of firms, households, and banks/NBFCs have weakened considerably and low demand for funds by firms as production activities have been on a standstill during the lockdown period, Singh said.

India has been under lockdown since March 25 to contain the spread of the coronavirus, resulting in supply disruptions and demand compression.

Prime Minister Narendra Modi imposed a nationwide lockdown to control the spread of coronavirus on March 25. It has been extended thrice, with some relaxations. The fourth phase of the lockdown is set to expire on May 31.