Russian government resigns after Putin announces reforms

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.

London, Mar 4: The UK government has reiterated its concern over the potential impact of the Citizenship Amendment Act (CAA) and said it is continuing to follow the events in India closely.

In response to an urgent question on “Recent Violence in India” tabled by Pakistani-origin Opposition Labour Party MP Khalid Mahmood in the House of Commons on Tuesday, UK’s Minister of State in the Foreign and Commonwealth Office (FCO) Nigel Adams said the UK engages with India at all levels, including on human rights, and also referred to the country's "proud history" of inclusive government and religious tolerance.

"The UK government also have concerns about the potential impact of the legislation (CAA),” said Adams, the Minister for Asia who was standing in for UK Foreign Secretary Dominic Raab, who is on a visit to Turkey.

"It is because of our close relationship with the government of India that we are able to discuss difficult issues with them and make clear our concerns where we have them, including on the rights of minorities. We will continue to follow events closely and to raise our concerns when we have with them,” said the minister.

While Mahmood, who had tabled the urgent question for an FCO statement, described the government response as “facile”, another Pakistani-origin MP Nusrat Ghani called on the government to relay the UK Parliament's concerns to the Indian authorities.

British Sikh Labour MP Tanmanjeet Singh Dhesi said the violence had brought back “painful personal memories” from the 1984 Sikh riots while he was studying in India and fellow Sikh MP Preet Kaur Gill also referenced 1984 in her intervention.

Other MPs sought to highlight the steps taken by the Indian authorities to restore “peace and tranquillity” in Delhi.

“He will be aware that it is not just Muslims who have been killed; Hindus have also been killed as part of the riots,” said Conservative Party MP Bob Blackman.

Scottish National Party (SNP) MP Alyn Smith sought the UK government’s intervention to share best practice around countering the online disinformation campaign being used in India to “inflame tensions”.

“We are in constant contact on these issues, and we know how important this is to Members of Parliament and their constituents, who may have family in the area,” said Adams, in his response.

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."