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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mumbai, May 13: Members of the Muslim community helped in performing the last rites of their 72-year-old Hindu neighbour in Sewri area here after the deceased's relatives could not reach for his funeral due to the lockdown.

Pandurang Ubale, who was paralysed since the last few months, died at his residence in Zakaria Bunder area of Sewri on Monday. He had been staying there along with his wife and son since some decades.

After his death on Monday, his relatives staying in suburban Mulund, Belapur in adjoining Navi Mumbai and Alibaug in neighbouring Raigad district could not come over to his place in the wake of the coronavirus-induced lockdown.

As Ubale's wife and son were unable to make all arrangements for the funeral, they informed their neighbours, who came forward to help and even prepared the bier.

A neighbour, Asif Sheikh, who attended the funeral, said, We knew Ubale uncle since a long time. He always participated in our festivals and we used to be a part of their festivities. We all came forward to bid him a farewell and helped in performing his last rites."

Last month also,some Muslim men carried the body of a Hindu neighbour in suburban Bandra on their shoulders to the cremation ground after the deceased's relatives were unable to attend the last rites due to the lockdown.

Kasaragod, Mar 23: The district administration on Monday decided to abandon efforts to map out the movement details of the NRI who came from Dubai recently and came into contact with many in North Kerala.

The district has been completely locked down since Monday morning, on the directive of the Central Government. Prohibitory orders have been slapped in the district since Sunday night to restrict socialisation of the people.

As the person now in isolation have allegedly been non-cooperative, the authorities were finding it difficult to sketch out a rote map as his movement and socialisation has been so vast and wide since his arrival here on March 12.

The middle aged and popular NRI who landed at Karipur airpprt on March 11 had been in Calicut till midnight prior to boarding the Maveli Express to make it to his hometown Kasaragod, which is 160 kms away from Calicut. He had come into contact with very many, including two MLAs of the district, prior to getting tested positive and getting isolated in the hospital.