Dr Kafeel Khan’s younger brother shot at near Gorakhpur temple

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Udupi, Jan 25: The accused, who planted a crude bomb at the Mangalore International Airport on January 20, was brought to Udupi on Saturday, to collect information, as part of the spot investigation, police said here.

According to police officials, accused Aditya Rao was brought to Karnataka Bank Kadiyali branch, where Rao had a Safe Locker. The team opened the locker and seized the documents, along with a Box.

They said the seized documents, along with the Box, will be sent to the FSL for investigation.

Bengaluru, Feb 15: The Karnataka Legislative Assembly has decided to set aside two days - March 2 and 3 - for a special discussion over the controversial Citizenship (Amendment) Act continues across the country.

Assembly Speaker Vishweshwara Hegde Kageri told media persons here today that the Assembly would act as a platform for legislators to speak about the relevance of the Constitution and its contributions for the last seven decades. He had already held a round of discussions with senior legislators and all have expressed their willingness to participate in the debate. More details of the discussion would be worked out in the next few days after a meeting of the Business Advisory Committee of the House on February 18.

Asked whether it would be possible to have discussions rising above partisan politics in the present scenario, Mr. Kageri said “I have appealed to members to discuss the Constitution beyond the political prism.” Each member would be asked to speak on a specific topic of the Constitution.