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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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May be because of infected Gomoothra
JINU...
How did U come into being... QURAN speaks on our CREATOR who created all that exits... and It asks us to use our intellectual which ALLAH has given us. I request you to PONDER on what it says...
Please read the QURAN once & research what it says... Dont just sit idle and make your own asumption. living a life of unaware... about the CREATOR will be worse than animals..
May God help them all! They are all innocents.
Devaru kotta prasada beda annbardu...! May be some sanghi poojaris' wanted to cut down cost for his selfishness. Probe needed.
May the victims recover soon!
I agree, believing blindly doesnt make sense... But God has given intellectual to human being and he created us to worship him alone... Y dont we use our intellectual to know who is worthy of Worship rather than worshiping idols and animals...
Even in vedas, it say that those who worship such things are in DARKNESS...So to come out of such DARKNESS ... the idols or man made god worshipers should try to know who is GOD and Y we need IDOLs to reach GOD...
God says he is near to any caller, there is no need keep any life less object and ask with it... in other sense U can call him by saying \O the one who put soul in me, who gave life to me ...Guide me.No doubt his help will come to those who trust him... Try it."
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