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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 2:  Fishermen in the coastal districts fear that the fishing season ending on May 31 every year might be rescheduled early this year due to the COVID-19 pandemic.

In a statement department of fisheries on sturday said fishing season is closed for 61 days every year before the arrival of the monsoon.

As per the data with the Fisheries Department, this year the number of fishes caught has set a record.

Bengaluru, May 29: Karnataka Law and Parliamentary Affairs Minister J C Madhuswamy on Thursday said the Centre has objected to the state's decision to increase working days at factories, and the matter would be discussed in the next cabinet meeting.

"....the Centre has raise objection to extending working days and has said it should be brought down. We will amend it....I will share the details after the next cabinet meet, the matter did not come up today (Thursday), we have received the letter," Madhuswamy told reporters in response to a question after the cabinet meeting.

He noted that a couple of states that had increased the working hours have withdrawn it. The Karnataka government had, on May 22, issued a notification allowing factories to extend working hours upto 10 hours a day and 60 hours a week till August 21. The extension of work hours is from the existing eight hours a day and 48 hours a week.

Pointing out that while announcing COVID-19 relief package, the Chief Minister B S Yediyurappa had announced Rs 5,000 per acre for maize farmers, Madhuswamy said while issuing the circular which mentioned that relief would be applicable to rabi crop, as it would not benefit many farmers.

Now, it has now been decided to give Rs 5,000 per acre to all maize farmers, irrespective of rabi or kharif. There were also several rules and regulations for barbers, autorickshaw and taxi drivers among others to claim their one-time compensation of Rs 5,000, the Minister said.

"We have decided to relax most of them (rules) other than those essential and give compensation, as regulations wouldn't have benefited many," he said. With five nominated seats of legislative council falling vacant on June 23, the cabinet has authorised the Chief Minister to nominate for 5 seats.

The cabinet also gave post-facto approval for Karnataka Repealing of Certain Enactments and Regional Law Bill 2020 that has been passed by the legislature.