Mangaluru: Uniwef to confer Sirhindi award on Ahmed Anwar

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Feb 27: A notorious history-sheeter named Slum Bharath was killed in an encounter with the police here in the wee hours of Thursday.

According to police, Bharath's associates attacked the police vehicle carrying him at around 2 am and fired two rounds at officers and police officials.

Bharath managed to flee with his associates in a car. 

He was later nabbed after the special team was informed at around 5 am that the accused's car was moving towards Hesaragatta near Soladevanahalli.

Bharath succumbed after he was shot by senior police officer Venkataramanappa who responded to his open firing. He was the prime accused in the murder of history-sheeter Srinivas alias Kulla Seena in 2006.

Tumakuru, Jan 4: Three people were burnt alive and four others sustained injuries in a head-on collision between a four-wheeler (Omni van) and a private bus on NH-206 near Doddaguni in Gubbi taluk of Tumakuru district in the early hours of Saturday.

Police said that Narasamma’s relatives and villagers were taking her to a hospital in Nittur when a private bus, heading to Shivamogga from Bengaluru, collided with the van on the tank bund road near Doddguni around 0200 hrs. The two vehicles caught fire and Vasanthkumar, Ramaiah and Narasamma were burnt alive in the van. The passengers in the private bus escaped unhurt.

The deceased were identified as Vasanthkumar (23), Ramaiah (62) and Narsamma (60) of N Hosahalli in Gubbi taluk, whereas the injured were identified as Ravikumar (23), Radhamani (30), Narasimha Murthy (40) and Gowramma (28).