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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Tumakuru, Jan 8: RSS leader Kalladka Prabhakar Bhat stoked controversy on Wednesday by stating that 'Jawaharlal Nehru University (JNU) is full of traitors'.

He was addressing the media after taking part in a pro-CAA rally organised by National Citizens Forum near the office of the deputy commissioner of the district here.

Bhat said, “JNU is full of traitors. Congress and communist parties have been generating anti-nationals there. But there is no need to close the university down. Modi government will handle it.”

“Nationalism should be infused among the students there through love and trust. They should be made to realize what the truth is,” he said.

Chennai, July 25: A widow living alone in her apartment in Chennai city suburbs has filed a police complaint against ABVP national president Dr Subbiah Shanmugam, accusing him of harassment, including urinating and throwing used surgical masks at her doorstep.

Shockingly, no action has been taken so far by the police, even though the complaint against Dr Shanmugam, who is in government service, was filed on July 11 at the Adambakkam Police Station here by the widow’s relative Balaji Vijayaraghavan. 

Dr Shanmugam and the 62-year-old widow were living in the same apartment complex in Nanganallur and an argument broke between them over a parking slot. “He wanted to use our parking lot. We agreed but demanded a nominal charge for using it. He was outraged by our demand and even broke our signboard at the parking lot,” Vijayaraghavan wrote in his complaint.

He also alleged that Dr Shanmugam began harassing her by throwing “pieces of chicken” outside her apartment despite knowing she is a vegetarian. Vijayaraghavan also alleged in his two-page written complaint that the ABVP National President had urinated outside the woman’s apartment gate and had been throwing garbage and used masks at her gate.

The 62-year-old woman has been living alone in her apartment for the last year following her husband’s death. In his complaint, Vijayaraghavan also said the family was “concerned about her safety”, while asking police to take action against Dr Shanmugam, who he says, “has a bad track record in maintaining rapport with neighbours.”

CCTV footage corroborates with the allegations of urinating outside the residence of the widow. However, the ABVP claimed the incident as a “malicious and derogatory propaganda” by the Congress’ student wing of NSUI.

Also Read: Finally FIR registered against ABVP national president for allegedly harassing widow