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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Feb 14: Two weeks after her engagement with another boy, a 20-year-old girl who was in love with a boy, committed suicide at her residence in Nanjangud on Wednesday.

Meghana's parents have accused her lover Manikanta of Hemmargala of abetting her suicide. The girl's father in his complaint has claimed that Manikanta threatened to send their photos to her fiance following which she took the extreme step. He has also claimed his daughter was molested by Manikanta two years ago.

Manikanta who is on the run has been booked for rape and abetting suicide following the complaint.

Since the girl was from the SC community, cops have also slapped cases under Atrocities (Prevention) Act against Manikanta. Nanjangud sub-division DSP Prabhkar Rao Shinde will investigate the case as charges have been made under provisions of the act.

Bengaluru, June 11: Amulya Leona, a college student, who was charged with sedition for raising "Pakistan zindabad" slogans in Bengaluru, has finally been granted bail. 

The court had denied her bail yesterday, saying she might abscond. But her lawyers had been pursuing another way of getting her out of jail where she has spent nearly four months.

Ms Leona's advocate, Prasanna R, said that the delay of the state in submitting a chargesheet in the case beyond the stipulated time meant she was eligible for "default bail".

"The default bail application was moved before the magistrate under whose jurisdiction the alleged crime was committed. The chargesheet has not been submitted by the state within 90 days. So default bail has been granted. We had moved the default bail plea on May 26 and again on May 29 when the court told us the earlier mail IDs had been disabled. A physical application was filed on June 2. The state filed the chargesheet on June 3," the lawyer said.

While the state tried to argue that they were entitled to an extension in the time allotted, the court hearing this aspect of the case gave an order favourable to Ms Leona. The process is on to release her.

The arrest of Ms Leona during a rally against the Citizenship (Amendment) Act or CAA in Bengaluru had led to a debate on the use of sedition charges.

The woman on a Facebook post had also said "zindabad" to many countries including India and Pakistan. She did also try to chant "Hindustan zindabad", but was soon silenced and whisked away. She was accused of sedition, causing enmity between communities and causing deliberate mischief.