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The current physical distancing guidelines provided by the World Health Organisation (WHO) and by the US Centers for Disease Control and Prevention (CDC) may not be adequate to curb the coronavirus spread, according to a research which says the gas cloud from a cough or sneeze may help virus particles travel up to 8 metres. The research, published in the Journal of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.

Study author, MIT associate professor Lydia Bourouiba, warned that droplets of all sizes can travel 23 to 27 feet, or 7-8 metres, carrying the pathogen.

According to Bourouiba, the current guidelines are based on "arbitrary" assumptions of droplet size, "overly simplified", and "may limit the effectiveness of the proposed interventions" against the deadly pandemic.

 She explained that the old guidelines assume droplets to be one of two categories, small or large, taking short-range semi-ballistic trajectories when a person exhales, coughs, or sneezes.

However based on more recent discoveries, the MIT scientist said, sneezes and coughs are made of a puff cloud that carries ambient air, transporting within it clusters of droplets of a wide range of sizes.

Bourouiba warned that this puff cloud, with ambient air entrapped in it, can offer the droplets moisture and warmth that can prevent it from evaporation in the outer environment.

"The locally moist and warm atmosphere within the turbulent gas cloud allows the contained droplets to evade evaporation for much longer than occurs with isolated droplets," she said.

"Under these conditions, the lifetime of a droplet could be considerably extended by a factor of up to 1000, from a fraction of a second to minutes," the researcher explained in the study.

The MIT scientist, who has researched the dynamics of coughs and sneezes for years, added that these droplets settle along the trajectory of a cough or sneeze contaminating surfaces, with their residues staying suspended in the air for hours.

"Even when maximum containment policies were enforced, the rapid international spread of COVID-19 suggests that using arbitrary droplet size cutoffs may not accurately reflect what actually occurs with respiratory emissions, possibly contributing to the ineffectiveness of some procedures used to limit the spread of respiratory disease," Bourouiba wrote in the study

New Delhi, Jul 22: Sir Philip Barton visited Bengaluru on Tuesday in the first of the series of virtual regional visits as the UK's new High Commissioner and called Chief Minister BS Yeddyurappa, business leaders, and startup community to pitch for new momentum in the already strong UK-Karnataka relationship.

During his virtual call, High Commissioner Barton got a 'real' taste of Bengaluru through a traditional Masala Dosa delivered to his residence in Delhi along with authentic south Indian filter coffee, which he relished over a chat with historian and commentator Ramachandra Guha. They discussed the unique UK-India "living bridge" across culture and cuisine, history and heritage, and sports and science.

Both Yeddyurappa and the British envoy restated their commitment to working together on the immediate challenges of Covid-19 and beyond.

Barton subsequently 'traveled' to Electronics City, where he met with a range of key business leaders to discuss deepening the UK-India tech partnership and opportunities for global investors in the UK.

Barton also met with a group of entrepreneurs, business founders and innovators, who were part of the first GoGlobal UK cohort to explore the dynamic UK market considered one of the best ecosystems for startups in the world. 

They had earlier attended a week-long boot-camp in London and Manchester in December 2019 that helped them bolster their business skills, build links with UK's thriving digital sector, and paved the way for future partnerships.

"I am delighted to make my first regional virtual visit to Bengaluru, the technology hub of India. My visit comes at a difficult time for everyone. So it is also a time when the excellent collaboration between the UK and Karnataka across technology and healthcare could not be important," Barton said.

"Making the most of those close links, and drawing on the great energy, innovation and entrepreneurship that Karnataka is famous for, will be central to ensuring we all recover from Covid-19 stronger than ever," he added.

Bengaluru, Jan 24: Karnataka Chief Minister BS Yediyurappa on Friday said the much-delayed Cabinet expansion will take place in the next three days.

At the Kempegowda International Airport, after his arrival from Davos, he informed that he would discuss the matter with Union Home Minister Amit Shah to take a final decision on the distribution of important portfolios.

Deputy CM Ashwanath Narayna, Home Minister Basavaraj Bommai and others received the Chief Minister at the airport. The issue of Cabinet expansion was kept in abeyance, ever since the spectacular victory of 12 Assembly seats for BJP, for which the by-elections were held recently. The bypolls were necessitated, following the resignation of about 17 sitting Congress and JD (S) MLAs, which resulted in the collapse of the JDS-Congress coalition government in the state.

BJP had reportedly lured the Congress and JD (S) MLAs into their camp, after promising them to give party ticket to contest the elections, as well as ministerial berths. The Chief Minister had kept as many as 16 Cabinet berths, along with plum portfolios, vacant, after forming the BJP government, with the support of the deserted Congress and JD (S) MLAs, in July last. However, the issue of Cabinet expansion had postponed on one reason or the other, as Yediyurappa was struggling to keep the promise he had made to the former Congress and the JDS MLAs, on whose sacrifice the BJP came back to power.

With the strong demand for ministerial berths within the loyal BJP MLAs, the BJP high command had reportedly advised Yediyurappa to accommodate only a few of the turncoat MLAs and strike balance between the groups.

However, Yediyurappa, who had assured the Congress and JD (S) MLAs of giving them Cabinet berths, had been in dilemma ever since and found it tough to convince the party's Central leaders.

According to party sources, the Chief Minister is not only facing problems over the expansion of his Cabinet, but is also worried over the demand for creation of more number of Deputy Chief Ministers, adding to the present list of three.