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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru: Seven fresh Covid 19 positive cases are reported in 24 hours which includes one death from Kalburgi. Of the 7 cases, Kalburgi and Vijayapura share 3 cases each and one case is from Dakshin Kannada, as per the Tuesday mid day health bulletin issued by the Department of Health and Family Welfare.

The deceased has been identified as a 80 year male from Kalburgi. He was bedridden from the past 3 years and was suffering from Parkinson’s Disease since 4 years. Health officials said that he came with the complaint of Severe Acute Respiratory Infection (SARI) and expired on Monday night.

Along with his death, the total death tally now stands at 17 and the total positive cases in the state is 415.

Kalburgi which recorded the first death for Covid 19 in India has so far reported 4 deaths including the above one. The first slot for recording more deaths in the state is now shared by Bangalore urban district and Kalburgi district with each recording 4 deaths each.

Kalburgi district now has 24 active cases.

All the three cases are females, reported from Vijayapura were the primary contacts of a Corona positive patient (P306), who inturn got infected from a patient with history of SARI.

Apart from the deceased male who tested positive, the other cases from Kalburgi is of 29 year old male with influenza like illness and other case is of a 61 year old male whose source of infection is yet to be traced by the health department.

The case from Dakshin Kannada district is from Bantwala region and the positive patient is a 67 year old female with history of SARI. She is getting treated at designated hospital at Dakshin Kannada.

Mangaluru, Jan 12: Sudarshan Moodbidri and Robin Devaiah were today unanimous elected presidents of Dakshina Kannada and Kodagu district units of Bharatiya Janata Party.

Karnataka BJP vice-president Nirmal Kumar Surana oversaw the election process of the two district units at the BJP’s party office here.

While Sanjeeva Matandoor, Puttur MLA and incumbent president of DK unit of the party welcomed his successor Sudarshan, it was the turn of BB Bharatheesh, president of Kodagu unit to welcome Robin.

K Uday Kumar Shetty, DK district election officer and Ravi Kalappa, Kodagu district assistant election officer conducted the election under the supervision of Surana in the presence of MLAs of the party from respective districts.

Sudarshan started out his career as taluk and then district convener of Bajrang Dal before taking up responsibility as seva pramukh of Vishwa Hindu Parishad.

He formally joined the BJP as general secretary of Mulki-Moodbidri assembly unit of the party, moved on as convener of training cell of the party and was the general secretary of the district unit of the party before his elevation. A B.Com student of Dhavala College, Moodbidri, he is 44.

Robin, 50, who started out as a RSS volunteer as a student, too is incumbent general secretary of the Kodagu unit. Having been a member of ABVP for 8-years, he joined BJP formally in 1996 through Yuva Morcha and was its district treasurer, national executive member and state general secretary.

A product of Field Marshal K M Cariappa College, Kodagu, he served two terms as general secretary of the district unit prior to his elevation.