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Bengaluru, May 24: Karnataka has conducted 2.03 lakh tests across the 57 Indian Council of Medical Research (ICMR) COVID-19 testing labs till Sunday morning, said the state Minister of Medical Education Dr K Sudhakar.

He informed that the state has doubled the number of tests in just 16 days after clocking 1 lakh tests on May 8.

"After clocking 1 lakh tests on May 8, we have doubled the number of tests in just 16 days. As on this morning, we conducted 2.03 lakh tests across our 57 ICMR COVID-19 testing labs. I congratulate doctors and lab technicians on this achievement," Sudhakar tweeted.

As many as 1,743 people have been detected positive for coronavirus in the state, of which 597 have been cured and discharged and 41 have succumbed to the infection, as per the Union Health Ministry. 

Chikkamagaluru, Jun 13: Deputy Commissioner Dr Bagadi Gautham said that movement of heavy vehicles has been banned from Tanikodi to S K Border on NH 169 (Mangaluru to Solapur) from June 15 to August 15.

In an official statement issued here on Friday evening, he said that due to heavy rain lashing in the District the minor bridges on the stretch at Umbalagere, Goravanahalli and Gulaganji are in a dilapidated condition. As a precautionary measure, the movement of heavy vehicles has been banned.

As an alternative, all the vehicles (below 15 tonnes) from Chikmagalur can travel via Baliho Nur-Magundi-Kalasa-Kudremukh-SK Border. The vehicles from NR Pura (below 15 tonnes) should travel via Koppa-Hariharapura-Bidaragodu-Agumbe.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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