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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Mar 29: The second day of a total clampdown by Dakshin Kannada district had no impact as panic-stricken people rushed to buy essential commodities in markets in the City on Sunday without caring for Social distance to be maintained.

Since the crowd swell within minutes the police were forced to order the shops forcibly as otherwise, it might have led to spread of dreaded killer Coronavirus COVID-19.

The rise in Covid-19 cases in Dakshina Kannada and the neighbouring Kasargod district had forced the district administration to declare on total bandh on Saturday and Sunday but in vain.

Bengaluru, Feb 10: The Rashtriya Swyamsevak Sangh (RSS) on Sunday conducted a route march (Pathsanchalan) in Ramanagara to express solidarity with the anti-Christian forces protesting against a project to install 114-feet tall Jesus Christ statue atop Kapalabetta in Harobele town in Kanakapura taluk in Ramanagara district.

Hindutva ideologue Kalladka Prabhakara Bhat, who had led a rally in Kanakapura last month against the project, also led the Sunday’s route march and addressed a public meeting following the march.

“The district name is Ramanagara, but they have not nurtured the culture of Ram here. They have developed a strong culture of Ravana, which we pledged to dislodge,” Bhat told the gathering.

He said the Sangh Parivar will never allow the statue to come up as he said it would foment religious conversion that is rampant in Harobele.

“The so called Kapalabetta is of stones, which are revered as Lord Muneswara by the Hindus. This hillock must be named as Muneswara Betta,” he added.

Referring to the ongoing protests against the Citizenship (Amendment) Act (CAA), Bhat said the law was brought in to protect the Hindu minority in Pakistan and Bangla Desh.

“The Muslims living in India hail Pakistan. But when we ask them to go to Pakistan, they will never go,” he took a jibe at the minority community.

Reacting to the RSS route march, senior Congress functionary DK Shivakunar, who represents Kanakapura assembly seat, said the Sangah Parivar is trying to disturb the communal harmony in the district and they will never succeed in it.

“The BJP is operating through the Sangh Parivar in the Ramanagara district. The party has won as may as 26 Lok Sabha seats in Karnataka, still they are doing all these things to keep their support base. People of Ramanagara will never back them,” said Shivakumar.