BJP supremo Amit Shah to visit Mangaluru on Oct 4

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.

Mangaluru, Feb 3: After neighbouring reported the second confirmed case of dreaded Coronavirus, the government of Karnataka today ordered high alert across border districts including Dakshina Kannada.

Apart from Dakshina Kannada, district administrations in Kodagu, Chamarajanagar and Mysuru that share boundary with Kerala have been put on high alert over the movement of people with suspected cases.

In a statement released on Monday, the Health and Family welfare department said that these districts have been directed to immediately report to the State Surveillance Unit (SSU) if they come across any suspected cases of people infected with Coronavirus.

Currently, about 51 people who returned from Coronavirus-affected regions have been identified and 46 are under home isolation across Karnataka.

So far, 44 samples have been sent to the National Institute of Virology, Pune for analysis and out of which 29 samples have revealed negative results. Yet, the state government has put in all possible measures to check the spread of the virus in any part of the state.

Davanagere, Jan 9: Residents of SVR colony of Channagiri Taluq here on Thursday built a temple in the memory of a male monkey, who died here 'unexpectedly'.

A group of monkeys entered the SVR colony around three months back. The monkeys have never disturbed anybody in the area and they used to play with children living in the colony.

Locals said that the monkeys are very obedient to them.

Unfortunately, one of the monkeys died suddenly on Wednesday, causing distress among people who were very fond of him.

Showing their love for the deceased monkey, locals performed his final rite according to Hindu tradition.

Later, the residents approached the president of the village Panchayat to allot funds to build a temple in the monkey's memory.

The construction of the temple has already begun in the area at the same place where the monkey's funeral was conducted.