PM Modi blasts cow vigilantes, calls them 'anti-social'

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Feb 8: A rare sixth century granite idol of ‘Lajja Gauri’ has been discovered fixed on the road in Barkur village of Udupi district, according to information furnished by Dr. Shivakant Bajpai, Superintending Archaeologist of ASI Bangalore Circle. Lajja Gauri is depicted in nude form and is said to be a fertility symbol. The idol is rare, though very popular among certain cults.

Dr Shivakant Bajpai, who is on a tour of the coastal districts, said that he first came across the image when it went viral on social media. He subsequently traced it to a public road in Barkur, which is an ancient historical town of coastal Karnataka. It was the ancient capital of the Alupa kingdom and a seat of power for several centuries.

“This is a very important idol and hundreds of vehicles pass over it every day. We are rescuing it and I have issued an order to my local in-charge to keep it in safe custody. I have also sent a mail in this regard to the DC and SP of the district,” he said.

The idol is likely to be of 6th or 7th century, though further study is required to confirm a date, Dr. Bajpai said.

Lajja Gauri is a lotus-headed Hindu deity associated with abundance, fertility and sexuality, sometimes euphemistically described as Lajja ("modesty").