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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
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whatever going on in the Dargah is against the teaching of islam and definately Allah hates this. Its unfortunate that people of fighting for power and unnecesary things. They are giving importance to not required customs which are not advised in islam. Few people are running dargah as business to make money. Its unfortunate that common people are getting fooled.
It is responsibility of waqf board and local MLA to bring peace in Ullal before some one get killed.
Let all elected representative sit together elect one as president who has majority.
It is easy job but some unseen hands playing behind the scene.
I request UTK to show the leadership before some one get killed.Just he need to do is tell both fraction that those who get majority will be president.
health minister's city became unhealthy goon's city
whats going on, fighting with own people this must be stopped immediately, it makes our rival to go out strong.
There is no difference between dargah and temple. Both make pooja by offering flower etc. Both make jathre(Uroos). Both make nerche (Harake). In islam no where taught like this. This fight is only for money.
koora and SSF's Dirty Game
fighting for dargha's authority, it defines u,
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