BJP’s poll strategy is telling lies and instigating communal sentiments: CM

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 21: Central Crime Branch (CCB) sleuths have nabbed a three-member Irani gang, including a woman and recovered from them 1 kg 33 gram stolen gold chains worth about Rs 40 lakh.

City Police Commissioner Bhaskar Rao told newsmen here on Saturday that the arrested were identified as Abujar, Abdul Hussain and Ms. Jenia, all hailed from Bhopal in Madhya Pradesh.

He said that the culprits, who had been arrested on similar theft cases, were out on bail and continued their criminal activities. They were involved in more than 23 cases.

Udupi, Jan 26: The late seer of Pejawar Mutt Vishwesha Tirtha Swami has been posthumously honoured with Padma Vibhushan for his contribution to spiritualism.

The seer, who passed away in December last, was known as a Hindu reformist spiritual leader.

He was also among the religious heads to be in the forefront of the Ram Janmabhoomi movement and was a vocal proponent for the construction of a Ram temple at Ayodhya.