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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Belgaum, Feb 24: Around 20 people entered a boys' hostel premises in Karnataka's Belgaum with rods and bats and destroyed properties allegedly over ragging of a girl by two hostel residents.

The incident took place on February 23 and was captured in the CCTV camera.

According to Belgaum Police, a gang of 20 people entered Dr BR Ambedkar post metric hostel premises in Belgaum with rods and bats. The group destroyed the properties of hostel, bikes, and scooters.

Police said this is an issue of ragging and during the incident, no students were injured.

Further, the investigation is underway.

Hassan, Feb 2: Former prime minister and JD(S) supremo H D Deve Gowda has said that the controversy over the Citizenship (Amendment) Act should be resolved peacefully through discussion.

Speaking to reporters in Halebeed on Saturday, Gowda said that the Act affects only Muslims but would also prove troublesome for the Hindus. “Opening fire on anti-CAA protesters is the not solution to the issue,” he said.

Deve Gowda said that during his tenure as prime minister a number of problems concerning Muslims were addressed. “But, in the run up to election, Rahul Gandhi described us ‘B’ team of BJP. This led to vote swing,” he added. When his comment was sought on the budget, the former prime minister said that he had not yet read the budget document.