Mangaluru: Basheer who was attacked by hatemongers loses battle for life

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.

Bengaluru, Feb 22: Thanks to joint efforts by the Protector of Emigrants in Bengaluru and Indian Embassy in Qatar, a 26-year-old woman from Karnataka who had been kept in confinement in Qatar has been rescued and brought back to India.

Anupama (name changed) from Holenarasipura in Hassan district arrived in Bengaluru on Thursday night. She was allegedly locked up in a house for 14 days, restrained from using a mobile and wasn't fed. There were three other women with her. On the midnight of February 12, they broke the window panes and fled before contacting local police.

Anupama, a diploma graduate in computer science, was jobless and her friend working in Kuwait suggested she try for a job abroad. She contacted an agency based in Chikkamagaluru which offered her a nanny's job in Qatar. After document verification, the agency demanded she pay Rs 2 lakh but she said she didn't have that kind of money.

The agency sent Anupama on a visitor visa but told her if questioned by immigration officials, she must claim she was visiting her sister. They also gave her a return ticket.

As Anupama was travelling abroad for the first time, she said she was ignorant about several things.

On January 12, Anupama left Bengaluru. But as she reached Qatar, all her documents, including passport, were confiscated by the agency. Her return ticket was cancelled and she was sent to a house to work as babysitter-cum-cook for Rs 30,000. She lived with four other maids in the same house, where they were made to work for 16-18 hours a day.

"I used to wake up around 5.30am every day and had to prepare breakfast for the employers by 6.30am. My work would end around 11pm every day. We never even got time to eat," Anupama told media on Friday. Four days into work, Anupama's nose started bleeding. However, the employers cared little and insisted she continue to work. After 18 days, she requested her employers that she be relieved.

The agency sent her to a house where three women were already present and locked her up with them. "They used to give us a glass of raw rice, an onion, tomato and potato to cook for ourselves. While we got rice every day, we had to use the vegetables for three days. We were not supposed to use mobiles or go out. Two people were monitoring us," she recalled.

Anupama and the others decided to approach police but for that they needed to escape. Around 1.30am on February 12, the four women managed to break window panes and jumped out. They ran for more than a kilometre and managed to approach police, who summoned the agency and got the women to speak to their families.

Anupama called her brother-in-law, who approached the Protector of Emigrants office in Koramangala, Bengaluru. Shubham Singh, PoE in Bengaluru, said they took up the issue with the Indian Embassy in Qatar, which immediately got in touch with Qatar police. Anupama said, "We were kept in prison for a couple of days and were sent to the deportation centre later."

Meanwhile, the Indian embassy got the agency to return the women's documents. However, the agents did not pay their salaries. Two of the women were sent to Hyderabad and the third to Kerala. On Friday, Anupama met Singh at his office, where her statement was recorded. "We have started the process of initiating action against the agency in India," he said.

Geneva, Jul 11: The World Health Organization said Friday that it is still possible to bring coronavirus outbreaks under control, even though case numbers have more than doubled in the past six weeks.

WHO chief Tedros Adhanom Ghebreyesus said the examples of Italy, Spain, South Korea and India's biggest slum showed that however bad a outbreak was, the virus could still be reined in through aggressive action.

"In the last six weeks cases have more than doubled," Tedros told a virtual press conference in Geneva.

However, "there are many examples from around the world that have shown that even if the outbreak is very intense, it can still be brought back under control," said Tedros.

"And some of these examples are Italy, Spain and South Korea, and even in Dharavi -- a densely packed area in the megacity of Mumbai -- a strong focus on community engagement and the basics of testing, tracing, isolating and treating all those that are sick is key to breaking the chains of transmission and suppressing the virus."

The novel coronavirus has killed at least 555,000 people worldwide since the outbreak emerged in China last December, according to a tally from official sources compiled by AFP on Friday.

Nearly 12.3 million cases have been registered in 196 countries and territories.

"Across all walks of life, we are all being tested to the limit," Tedros said, "from countries where there is exponential growth, to places that are loosening restrictions and now starting to see cases rise.

"Only aggressive action combined with national unity and global solidarity can turn this pandemic around."