"Good To See" India Banning 59 Popular Chinese Apps: Nikki Haley

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.

Karachi, Jun 5: Pakistan's coronavirus cases rose to 89,249 on Friday after a record 4,896 new infections were detected in the country, while the death toll due to COVID-19 has reached 1,838, according to the health ministry.

The Ministry of National Health Service said that 68 patients died in the last 24 hours, taking the death toll to 1,838, whereas another 31,198 people have recovered.

It was the third consecutive day when a record number of cases were reported in Pakistan after the Eid holidays and easing of lockdown restrictions at the end of May.

Sindh province reported 33,536 infections, Punjab 33,144, Khyber-Pakhtunkhwa 11,890, Balochistan 5,582, Islamabad 3,946, Gilgit-Baltistan 852 and Pakistan-occupied Kashmir 299.

The authorities have conducted 638,323 tests, including a record 22,812 tests in the last 24 hours, the ministry said.

Despite the spike in number of COVID-19 cases, both houses of parliament are scheduled to meet separately on Friday. The Senate session started this morning while the National Assembly will be held in the afternoon, Radio Pakistan reported.

Chairman Senate Sadiq Sanjrani and Speaker National Assembly Asad Qaiser at a meeting at the parliament house in Islamabad reviewed arrangements made for the two sessions.

Fumigation was also carried out in the parliament house for the safety of the lawmakers and staff.

Earlier, the Opposition rejected the idea of virtual meetings and insisted that the sessions be held in person, noting that it was an important session of parliament because the budget is expected to be presented in the National Assembly in the next week.

The novel coronavirus which first originated from China's Wuhan city in December last year has claimed 391,249 lives and has infected over 6 million people globally, according to Johns Hopkins University data.

Jul 17: US President Donald Trump has said that he wants to do everything possible to keep peace for the people of India and China, according to his spokesperson

Over the past several weeks, the Trump administration has come out in support of India against China.

“He (Trump) said I love the people of India and I love the people of China and I want to do everything possible to keep the peace for the people,” White House Press Secretary Kayleigh McEnany told reporters at a news conference here on Thursday.

She was responding to a question on Trump’s message to India, which recently had a standoff with China in eastern Ladakh along the Line of Actual Control.

Earlier in the day, White House Economic Advisor Larry Kudlow described India as a great ally, saying President Trump is a great friend of Prime Minister Narendra Modi.

On Wednesday, Secretary of State Mike Pompeo said that India has been a great partner of the US.

“India has been a great partner… They are an important partner of ours. I have a great relationship with my foreign minister counterpart. We talked frequently about a broad range of issues. We talked about the conflict they had along the border with China. We've talked about the risk that emanates from the Chinese telecommunication infrastructure there,” Pompeo told reporters in response to a question.

Travelling in Europe, US National Security Advisor Robert O’Brien told reporters that China has been very aggressive with India.

O’Brien said that India is a democracy and is a great friend of the United States. Prime Minister “Modi and President Trump have a super relationship,” he said.

“In fact, it was the last foreign trip that I took with the president before the COVID-19 crisis hit, was to India, and we had a great reception of the Indian people there. We have a lot in common with them, we speak English, we're democracies. We've got a growing, very strong relationship with India,” O’Brien said.

Welcoming the White House statement, Al Mason, co-chair of the Trump Victory Indian American Finance Committee, said that unlike his predecessor, President Trump has come out openly in support of India.

“Most of the Indian-Americans have observed that every earlier president - be it a Democrat or Republican, like Clinton or Bush Senior or Bush Jr or Obama have been very scared to side with India openly, for fear of hurting China.

“Only President Trump has had the courage to say that… I love India, America respects India… US stands with India - and that also, to over one billion Indians in India at the Namaste Trump rally held in India… and that too… near India’s neighbour China,” Mason said in a statement.

“And he is consistent in his love for India and Indian-Americans,” he added.