Security tightened ahead of Datta Jayanti, Eid-Milad; prohibitory orders clamped

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 4: In line with the directive of the Deputy Commissioner against opening textile shops even after the relaxation of lockdown, it has been decided to continue the closure of all textile shops in Hampankatta area of Mangaluru until the end of the blessed Ramadan, President of KTA Youth Forum said on Monday.

Pointing out that several rumours were doing the rounds in social media on the opening of textile shops in the wake of Eid, the owners of textile shops met on Monday morning and unanimously decided against opening the shops. The association said the local MLA has also been consulted on the issue.

KTA Youth Forum is an organisation of owners of shops at Kunil Centre in Tokyo Market and Akbar Complex here, mostly comprising of Muslims.

Kalaburagi, Feb 24: Former Karnataka chief minister Siddaramaiah on Monday alleged that dissatisfaction and unhappiness are rising among the local Bharatiya Janata Party MLAs and the party might soon witness large scale defection.

Addressing the media, Mr. Siddaramaiah said many of the BJP MLAs have openly expressed their disappointment and unhappiness with the BJPs high command and also with Chief Minister B S Yeddyurappa's attitude towards them and they have said that they want to join the Congress at the earliest.