Sangh has lost its credibility by indulging in financial, moral corruption: RSS veteran

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Panaji, Feb 6: Goa Chief Minister Pramod Sawant on Wednesday told the Legislative Assembly that neighbouring Karnataka has diverted the Mahadayi river water, due to which its flow in the state has taken a hit.

He was speaking during a debate on the motion of thanks to Governor Satya Pal Malik for his address.

Goa and Karnataka are locked in a dispute over sharing of the Mahadayi river water. Goa is strongly opposing the Kalasa Banduri project proposed to be built by Karnataka on the river, which is aimed at providing drinking water to three north Karnataka districts by diverting the Mahadayi water into the Malaprabha river.

Speaking in the House, Sawant said that the flow of Mahadayi river has reduced due to the diversion of water by Karnataka.

"I am admitting that they (Karnataka) have diverted the water. We have brought it to the notice of the Union Ministry of Environment, Forest and Climate Change," he said.

The Goa government has explained to the Centre that the water which flows into the state is "not wasted".

"We have told them that the perennial flow of water is necessary for Goa's wildlife," he said.

Sawant said that his government was serious on the issue of Mahadayi.

"Mahadayi is more than a mother to me. We have not compromised anywhere on the issue. I have been associated with the Mahadayi agitation since 2000," the chief minister said.

He said the issue would be fought before the Supreme Court, where special leave petition has been filed by the state.