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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Udupi, May 12: The Coastal Bus Owner’s Association members have approached Deputy Commissioner to permit them to run bus service in the District.

Nearly 80 buses coming under the Coastal Bus Association and they are prepared to run the buses as per the guidelines set by the government. They have also requested RTO officials for permission to operate and are awaiting approval. If the bus service starts operating, many workers like drivers, conductors, cleaners, mechanics will get employment.

Coastal Bus Owners Association President Raghavendra Bhat said that the bus owners must provide services to the public as per regulations set by Deputy Commissioner.

Bantwal, Jun 16: Two unmarred siblings committed suicide by self-immolation at Sangabettu in Bantwal taluk of Dakshina Kannada last night.

Neelayya Shettogar (42) and his sister Kesari (39) poured petrol on themselves before torching themselves at around 11 p.m. on June 15 inside a room of their house, police sources said. The siblings were reportedly facing health problems.

Neelayya's brother and latter’s wife were sleeping in the other room of the same house when the incident took place. They came to know only when they heard the screams of the duo.

Even though the siblings were rushed to the government hospital at Bantwal with the help of locals, the doctors declared them dead.

Bantwal rural police sub-inspector, Prasanna and staff visited the spot as part of investigation.