Dilwale overcomes 'intolerance' in Mangaluru; screening resumes

Udupi, Jul 21: Udupi Court complex has been sealed down for two days for sanitisation after a judge tested positive for Covid-19, a source said on Tuesday.

The Covid cases in Udupi district which had reduced recently are once again seeing a spurt. On Monday, as many as 98 have tested positive taking the total cases in the district to 2,321.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 10: A 58-year-old official of the Central Industrial Security Force (CISF) has died due to the coronavirus infection, taking the death toll in the paramilitary force because of the disease to nine, officials said on Friday.

Assistant Sub Inspector K B Premsha, posted in the CISF unit that guards the Mangalore Refinery and Petrochemicals Ltd (MRPL), passed away at a local hospital on Thursday, they said.

He was admitted to the hospital on July 5 with fever. His COVID-19 test report arrived on July 7 and it was positive. Premsha breathed his last on Thursday, officials said. He was a resident of Kodagu in Karnataka.

This is the ninth COVID-19 death in the force that has recorded 1,137 cases till now, according to an official data.

Of the total cases reported in the force so far, 410 are under treatment across the country, nine have died and the rest have recovered, officials said.

They said that 20 personnel tested COVID-19 positive on Friday while 22 have recovered over the last 24 hours.

The about 1.62-lakh strong CISF is the national aviation security force guarding 63 airports at present and it is also tasked to guard vital installations in the aerospace and nuclear domain.