People in this Karnataka city boycott health survey mistaking it for NRC

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, May 22: Amid the fourth phase of nationwide COVID-19 lockdown, inter-state travel from Karnataka is now permitted with the consent of the receiving state, informed Praveen Sood, Karnataka Director General of Police (DGP) and Inspector General (IG).

"Inter-state pass is not required to go out of Karnataka as long as you have the consent of the receiving state," he said.

The order follows MHA's recent announcement of relaxed guidelines amid the nationwide lockdown.

"Due to lockdown, migrant workers, pilgrims, tourists, students and other persons are stranded at different places. They would be allowed to move as under," read the new guidelines while asking states to designate nodal authorities to facilitate the interstate movement.

The Centre has extended the lockdown till May 31 across the country.

Bengaluru, Feb 16: Radhakrishnan V Nair embarked on a journey of exploring complex subjects and opening up the cocoon of existence that puts people in a zone of comfort. One sole mission of the book is to encourage the readers to break out of that comfort zone.

The architect by profession has a novel to his credit, 'The Cave of Freedom' that had earned him critical acclaim from Jnanpith Awardee UR Ananthamurthy. On February 13, a discussion and the reading of his book had the audience riveted to their seats.

The launch of the book on February 13 at Bangalore International Centre was presided over by Bhaskar Rao, Commissioner of Police, Bengaluru, along with Vasudev Murthy, Technology Management Consultant, leadership trainer and author and Ramessh RK, an industrial designer and choir singer who read out passages from the book.

'Radhakrishnan is trying to inspire you to discover the pleasure of breaking the glass barrier along with the protagonist Dr Prateek. The story 'burst out'", said Radhakrishnan when it could not be contained any longer.

The glass ceiling saw a lot of interest from the audience present. The book includes Dr Prateek who is obsessed with saving lives in the Emergency Room (ER) as the world slept. Then on an eerie rainy night, he is kidnapped.

He struggles to come to terms with the improbability of waking up somewhere in Europe and making his serendipitous escape and being back at work the next morning - all physically impossible from the point of view of time and locality.

The glass ceiling challenges you to see tragedies and their impact on a person's mental well-being from a different perspective.

Radhakrishnan V Nair is an architect by profession and runs his Bengaluru-based firm - Archaid, the tagline of which is 'Architecture in Collaboration with Nature'.