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London, Feb 19: UK Home Secretary Priti Patel today announced the launch of the Britain's new points-based visa system, aimed at attracting the "brightest and the best" from the world, including from India, and cutting down numbers of cheap, low-skilled workers coming to the country.

The new system will come into force from January 1, 2021 at the end of the transition period after the UK's exit from the European Union (EU) last month, which will formally end free movement of people within the economic bloc for the UK as a non-member.

The new post-Brexit system, which will apply equally to the EU and non-EU countries like India, is based on assigning points for specific skills, qualifications, salaries and professions, with visas only awarded to those who gain enough points.

"Today is a historic moment for the whole country. We're ending free movement, taking back control of our borders and delivering on the people's priorities by introducing a new UK points-based immigration system, which will bring overall migration numbers down," said Ms Patel, the senior-most Indian-origin Cabinet minister.

"We will attract the brightest and the best from around the globe, boosting the economy and our communities, and unleash this country's full potential," Ms Patel, in charge of the UK's visa and immigration system, said.

The UK Home Office said the new system is a direct response to the 2016 referendum in favour of Brexit, which was seen as a vote to end the country's reliance on cheap migrant labour and reduce overall levels of migration with tighter security.

"The new single global system will treat the EU and non-EU citizens equally. It will give top priority to those with the highest skills and the greatest talents, including scientists, engineers and academics," the Home Office said.

The Global Talent Scheme, a fast-track visa to be in operation from Friday, will also apply to the EU citizens from next year to allow highly-skilled scientists and researchers to come to the UK without a job offer.

Professor Alice Gast, President of Imperial College London, said: "British science is global. The new post-study work and Global Talent visas will help us to attract the world's brightest students and researchers, wherever they come from."

"From the race to develop a coronavirus vaccine to clean energy, British science's international collaborations drive innovation and excellence."

The government said the points threshold for the new system will be carefully set to attract the talent the UK needs. Skilled workers will need to meet a number of relevant criteria, including specific skills and the ability to speak English, to be able to work in the UK. All applicants will be required to have a job offer and, in line with the Migration Advisory Committee''s (MAC) recommendations, the minimum salary threshold will be set at 25,600 pounds - lower than the previous 30,000 pounds level for Tier 2 work visas.

The new points-based system will also expand the skills threshold for skilled workers.

Those looking to live and work in the UK will need to be qualified up to A-level or equivalent, rather than degree-level under the current system. This will provide greater flexibility and ensure UK business has access to a wide pool of skilled workers, the Home Office said.

In line with the British Prime Minister Boris Johnson's manifesto commitment in the December 2019 General Election, there will be no specific route for low-skilled workers.

"It is estimated 70 per cent of the existing EU workforce would not meet the requirements of the skilled worker route, which will help to bring overall numbers down in future," the Home Office said.

Student visa routes will also be points-based and be opened up to EU citizens from next year.

Those wishing to study in the UK will need to demonstrate that they have an offer from an approved educational institution, that they can support themselves financially and that they speak English.

To address the specific labour concerns of the agricultural sector reliant on seasonal workers from the EU, the Seasonal Workers Pilot will be expanded in time for the 2020 harvest from 2,500 to 10,000 places.

EU citizens and other non-visa nationals will not require a visa to enter the UK when visiting the UK for up to six months.

However, the use of national identity cards will be phased out for travel to the UK and the Home Office highlighted that as part of its post-Brexit offer, those EU citizens resident in the UK by December 31 2020 can still apply to settle in the UK through the EU Settlement Scheme until June 2021.

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.

Italian researchers have claimed that they have successfully developed a vaccine to contain coronavirus (COVID-19) which is likely to work on humans, a report said.

Luigi Aurisicchio, CEO of Takis, the firm developing the medication, said that a coronavirus candidate vaccine has neutralised the virus in human cells for the first time, the Arab News reported.

"This is the most advanced stage of testing of a candidate vaccine created in Italy. Human tests are expected after this summer," Aurisicchio was quoted as saying to Italian news agency ANSA.

"According to the Spallanzani Hospital, as far as we know we are the first in the world so far to have demonstrated neutralisation of the coronavirus by a vaccine. We expect this to happen in humans too," he added.

The researchers experimented with the vaccine on mice that had successfully developed antibodies that blocked the virus from infecting the cells. They further observed that the five vaccine candidates generated a large number of antibodies, and selected two with the best results.

All of the vaccine candidates currently being developed are based on the genetic material of DNA protein "spike", the molecular tip used by the coronavirus to enter human cells.

They are injected with the so-called "electroporation" technique, which consists of an intramuscular injection followed by a brief electrical impulse, helping the vaccine break into the cells and activating the immune system, the report said.

Researchers believe that this makes their vaccine particularly effective for generating functional antibodies against the "spike" protein, in particular in the lung cells, which are the most vulnerable to coronavirus.

"We are working hard for a vaccine coming from Italian research, with an all-Italian and innovative technology, tested in Italy and made available to everyone," Aurisicchio was quoted by the Arab News report.

"In order to reach this goal, we need the support of national and international institutions and partners who may help us speed up the process," he noted.

The total number of COVID-19 infections, fatalities and recoveries since the pandemic began has risen to 213,013 in the country.