Two more men held in Kannur over suspected IS links

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 24: Bengaluru police registered an FIR against a 23 year-old woman who, while in home quarantine, visited supermarket despite having clear instructions to stay at home.

The Vijayanagar police said that the woman, a resident of Vijayanagar, had returned to the City on March 22 after a visit to Dubai."The city police had visited her house and stamped her for home quarantine and instructed her to stay at home but she visited Reliance Fresh on Monday.

We received information about it and the footage. Following this, we registered an FIR against her under section 269 (negligent act likely to spread infection of disease dangerous to life). We traced her and warned her to stay at home. We are also consulting senior officers and health officers on whether we have to send her to the government quarantine Centre or not,"the police said.

Commissioner of Police Bhaskar Rao strictly warned the people who are home quarantined to stay at home in public interest. If they were found in public places they will be picked up, arrested and sent to government quarantine."Please log in to get detailed story.

Bengaluru, Jul 22: A 54-year-old man committed suicide at his home, after he learned that he was tested positive for Covid-19, at Devasandra, in Sadashivanagar.

The deceased, Shivamahadeva, ran a cot shop in Yeshwantpur along with his brother. The police said that he was single and was living with his elder brother and his family.

In another incident, a 50-year-old man, committed suicide fearing Covid-19 and the stigma related to the illness.

The deceased has been identified as Nagaraju, a resident of Doddaballapura and a native of Hesaraghatta, and his body was found at the Hesaraghatta lake.

The police said that during the investigation it was found that the neighbours had accused Nagaraju of spreading the infection.