Police arrest prime accused in SDPI activist’s murder

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 11: Karnataka Congress chief D K Shivakumar on Saturda said that he was hopeful that the Karnataka Chief Minister would take stern action against BJP MLA M Jayaram--who was on Friday seen celebrating his birthday with several villagers in Gubbi taluk in Tumkur, in violation of social isolation measures and nationwide lockdown to fight the coronavirus outbreak.

"I am sure that the Chief Minister will take action on all these types of activities. We have already petitioned the DGP. Suo moto case should be registered immediately," the Karnataka Congress Chief told media.

Speaking about the video conference meeting that Congress President Sonia Gandhi held with all Pradesh Congress Committee (PCC) presidents via video conference, he said: "She has given us directions that the party has to play its own role. She said that the party needs to be very active, apart from the government."

With regards to the farmer's struggles due to the national lockdown, the Karnataka Congress Chief said that the farmers are in a 'very grim situation'. "I appeal to all the people of Karnataka that we should go to the fields and discuss with farmers and buy the materials. Let us purchase their fruits and vegetables and distribute them at the village level."

Mangaluru, Jan 16: The Akhil Bharatiya Vidyarthi Parishad is holding rallies and meetings and distributing booklets across the country in support of the Citizenship (Amendment) Act, said ABVP National Secretary Harsha Narayan here on Thursday.

Speaking to media persons, he said that the CAA, which provides citizenship to Hindus, Buddhists, Sikhs, Parsis, Jains and Christians persecuted in Pakistan, Afghanistan and Bangladesh, was among the things that the ABVP was fighting for.