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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, May 28: A complaint has been filed against BJP Karnataka state president and Lok Sabha member Nalin Kumar Kateel by the Congress Legislators charging him with issuing false information on Coronavirus to mislead the people.

The complaint was filed by MLCs Ivan D’Souza and Prakash Rathod at Vidhana Soudha police station on Thursday.

In the complaint they had alleged that “Kateel has been spreading false information that the position of World Health Organization’s (WHO) Chairman was given to India in appreciation of Prime Minister Narendra Modi’s achievement in Coronavirus management. 

In reality, the position was given to India on the basis of rotation. India’s stature gets affected because of such childish statements at the international level.”

Mangaluru, Feb 28: In a shocking incident, an engineering student has committed suicide on the railway track at the Someshwara railway station near Ullal on the outskirts of the city.

The deceased has been identified as S Rayagowda (23) from Belgaum.

It is suspected that he resorted to the extreme step due depression after love failure. Railway police are investigating the matter.