Frontline warrior Dr Shaukat Ali dies of COVID-19 after hospitals refuse admission

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, May 4: Karnataka Pradesh Congress Committee (KPCC) president DK Shivakumar on Sunday condemned the arrest of women Congress leaders who were marching to Chief Minister BS Yediyurappa's house demanding action against BJP MLAs "caught" repacking food materials meant for Anganwadi children and pregnant women.

Taking to Twitter, Shivakumar posted pictures of the incident and wrote, "Strongly condemn the arrest of women congress leaders who were marching to the CM's house to ask for action against BJP MLAs caught repacking food materials meant for anganwadi children and pregnant women. Earlier, held a protest and PC demanding arrest of those involved in the scam."

Earlier on Sunday, Former Karnataka Chief Minister Siddaramaiah claimed that BJP leaders are "stealing" government grocery packets, pasting their photos and providing them to "well off party workers".

Taking to Twitter he wrote, "It is unfortunate that BJP leaders are exhibiting their political cruelty even during crisis. They are stealing govt food & grocery packets to paste their photos and then give it away to their well off party workers."

"Aravind Limbavali and other BJP leaders are caught branding themselves through the government distributed food packets. Nothing is more disgraceful and shameful than this. They should be made to resign & should be arrested," he wrote.

He further asserted that the Karnataka Chief Minister is directly responsible for the leakage. He has allowed his party workers to siphon off poor people's food.

"Shashikala Jolle (Minister of Women, Child Development and Empowerment of Differently Abled, Senior citizens, Govt of Karnataka) should immediately resign for her laxity and allowing her party people to steal from Anganwadi," he added.