Fisherman feared dead; search operation called off

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jun 16: Karnataka Pradesh Congress Committee (KPCC) chief DK Shivakumar's daughter Aishwarya and Cafe Coffe Day founder late VG Siddhartha's son, Amarthya Hegde got engaged at SM Krishna Residence, Sadashivanagar in Bengaluru on Monday.
Only family members were present in the event. Amarthya Hegde is also the grandson of former Union Minister SM Krishna.
Last year in July, the body of Cafe Coffee Day (CCD) founder Siddhartha was unearthed on the banks of Netravati river.

Bengaluru, Mar 15: All 21 Madhya Pradesh MLAs from Jyotiraditya Scindia's camp, who were lodged here at Prestige Golfshire Club, have been shifted to Ramada hotel in Yelahanka ahead of Monday's floor test in the state assembly.

In view of their arrival, the concerned authorities have strengthened security outside the hotel.

Following the exit of Scindia from Congress, these MLAs claimed to have resigned from the state Legislative Assembly.

On March 11, Congress sent two of its leaders -- Sajjan Singh Verma and Govind Singh -- to Bengaluru in order to pacify some of these rebel MLAs.

Most of the rebel MLAs are perceived close to Scindia and were apparently unhappy at Scindia being "ignored" in the party.
Meanwhile, Madhya Pradesh Congress MLAs, who arrived in Bhopal from Jaipur today morning ahead of the floor test in the Assembly on Monday, have been shifted to Courtyard by Marriott Hotel.

These MLAs were accompanied by senior Congress leader Harish Rawat, who exuded confidence of Kamal-Nath led government winning floor test in the Assembly.

Both Congress and BJP have issued whips to all its MLAs for the legislative assembly session in Madhya Pradesh, which is scheduled to be held from March 16 to April 13.

On Saturday, Madhya Pradesh Governor Lalji Tandon had directed that a floor test will be held in the assembly on Monday.