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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, June 6: As many as 24 coronavirus positive cases reported in Dakshina Kannada in 24 hours (from 5 p.m. June 5 to 5 p.m. June 6). 

With this the total number of covid-19 cases mounted to 167, among which 88 are currently active. 

Among the newly detected 24 cases 11 are Maharashtra returnees, 6 are Dubai returnees, 1 is Arabia returnee, 1 is Ukraine/Turkey returnee. And source of 5 new cases still remained untraced.
 

In a shocking incident, a pharmacist-cum-production manager of an Ayurvedic product company in Chennai’s T.Nagar died after drinking a chemical preparation he reportedly formulated for tackling the Coronavirus.

The managing director of the company, who is an ophthamologist by qualification, was hospitalised after he fainted soon after he ingested the chemical component.

The deceased, K.Sivanesan, 47, of Perungudi, was with Chennai-based Sujatha Biotech, an Ayurvedic and herbal products company which was founded 30 years ago. It has a plant in Kashipur, Uttarakhand, where Sivanesan was working. Sivanesan had devised formulas of various products and used to visit his managing director Dr. Rajkumar frequently in the city.

Due to the lockdown, Sivanesan came to Chennai and stayed with his family in Perungudi. On Thursday morning, he procured the chemical component from a market in Parry’s Corner.

First he gave a small amount powder he derived from the chemical to 67 years-old Rajkumar who fainted after tasting it.

Even as he was being resuscitated, Sivanesan went into the kitchen of the house and gulped it in liquid form after adding water to it. He could not be revived.

Deputy Commissioner of Police, T.Nagar, Ashok Kumar, said, “Our investigation revealed that Sivanesan died after drinking the preparation he claimed would help COVID-19 patients. His managing director fainted after tasting it initially. Further investigation is on.”

Sivanesan was rushed to a private hospital in T.Nagar and declared dead by the doctors there. Later his body was shifted to Government Royapettah Hospital for post-mortem. Teynampet police registered a case under section 174 of Criminal Procedure Code for unnatural death.

N.S.Vasan, designer-cum-media manager of the company said, “Due to the lockdown, Sivanesan stayed in the city and one day told us he heard of some medicine from U.S. President Donald Trump’s recent speech for curing Coronavirus. He said it would bring more immunity and help to prevent COVID-19. Deciding to test the effect of the medicine, he went to Parry’s Corner and bought the powder.” He added that Sivanesan must have taken a heavy dosage of the ‘drug’ and he was killed instantly.