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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mysuru, May 6: A seven-months pregnant woman fled Covid-19 hotspot Mumbai along with her family, and made it to her village 1000 km away in KR Pet taluka in Mandya district of Karnataka, flashing her mother's ID card at each checkpost. After reaching her destination, she got herself tested for Covid-19.

She tested positive for the virus on Monday in Mandya.

The 20-year-old woman (assigned the number P637) had been living with her husband and in-laws at Santa Cruz East, Agripada in Mumbai for the past three years. To get out of the containment zone, they started out from Mumbai at 7.30 pm on April 23 -- she, her husband, brother-in-law, co-sister and their children, and a 19-year-old girl. She made it past checkposts at Belagavi, Hubballi, Davanagere, Kadur, Arasikere, Channarayapatna and Shravanabelagola and reached her village Jaaginakere at 3 pm on April 24.

She stayed at her home in the village from 24 April to April 29. With the Mandya district administration testing people on a campaign mode in the entire district, she and her family got themselves tested on May 1.

Her test returned positive on May 4, according to deputy commissioner M V Venkatesh.

Along with her, the 19-year-old girl (P638) who travelled with the family also tested positive. The girl is in the sixth semester of her BE Electronics course at an engineering college in Mumbai.

This is not the first case of a corona fugitive from Mumbai. Earlier, a 50-year-old man who ran a hotel in Mumbai travelled in a vehicle carrying dates and reached Channarayapatna in Hassan district.

In fact there have been three such incidents, including that of seven people coming to Mandya from Mumbai transporting a dead man's body for cremation in his native village of B Kodagalli in Pandavapura taluk.

Mandya deputy commissioner Dr Venkatesh has appealed to natives of Mandya who are stuck in Mumbai to stay there till the Covid situation comes to control.

So far 28 people in Mandya diatrict have tested positive for Covid 19. Seven people have been discharged. Currently there are 21 active cases being treated at the Mandya Institute of Medical Sciences.

Mangaluru, Jan 2: Shwetha Rasquinha, Assistant Professor and Head of the Department of Social Work, St Aloysius College, Mangaluru, has been awarded Doctor of Philosophy (PhD) degree by the Mangalore University for her thesis titled “Effectiveness of Social work intervention on caretakers of cancer patients- A social work study in Mangalore”.

She did her studies under the guidance of Dr Rameela Shekhar, Professor (Rtd), School of Social work, Roshni Nilaya, Mangaluru.

Ms Shwetha Rasquinha hails from Vittal, D/o Vincent Rasquinha and Late Regina Rasquinha, and is the second person to complete doctoral studies from the Vittal Parish.

Her colleagues and well-wishers have congratulated her for her highest achievement in academics and successful completion of quality research.