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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Kundapur, Apr 28: The local police have arrested two people for threatening and preventing an Associated Social Health Activist (ASHA) workers from discharging their duties during the lockdown.

Police said on Tuesday that the arrested are Sandeep Mesta and Mahesh Kharvi.

According to official sources, the health officials had put Sandeep under quarantine for 28 days.

However, he was seen wandering in the streets and ASHA worker C Laxmi warned him to stay indoors.

Irked by the warning Sandeep, along with his friend Mahesh Kharvi waylaid her and threatened to kill for objecting his movement.

Mangalore, Mar 18: The Dakshina Kannada District Home Guards felicitated social activist and Executive Director of Centre for Integrated Learning, Sachitha Nandagopal at the Home Guards district office to mark the International Women's Day recently.

She was recognised for her achievements and contributions to the society in the field of education, culture and mental health.

Sachitha Nandagopal, a former Head of Department of Journalism at Besant Women's College and Principal of CMR Post Graduate Centre for Media Studies, Bangalore, is the Co-Founder of Centre for Integrated Learning, Mangalore which is an NGO working in the field of alternative education, adding value to the present education system. As a Facilitator in Dance Movement Therapy, she has founded Anveshanam - Centre for Mindfulness and Emotional Wellbeing, an organisation dedicated to addressing mental health issues.

She was honoured by District Commandant, Dakshina Kannada Home Guards, Dr. Muralimohan Chunthar. Senior Home Guard Ramesh Bhandary, Diwakar, Mahesh and lady personnel of Home Guards were present on the occasion.