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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
He also said that he would never accept the award.
Comments
who cares? go to hell
Media made her popular. No valve for this award. I strongly support raviji for this.
I wish that in your next birth you born as a girl in a backward country like Pakistan or Afghanistan , and if then you are able to raise your voice after being shot at and then if you still stay strong and become an inspiration to millions and the word then and only then would you deserve the respect that your are seeking so desperately.
Malala was also a western drama.... More people deserve to be honoured..... But why shriji just opposed malala only..... Shows comunal mentality clearly
I agree with Ravishankarji.
I agree with Ravishankar ji.
Bro Mohammad, #2
There is medicine for JEALOUSY, HATE, CRIME, EVIL habits... But the person should take the change to change himself.
Let the Jealous person read the biography of Prophet Muhammad Pbuh. and also let him read the QURAN which is the Guidance for humanity and how to live life according to the law of God. JEALOUSY will run away automatically if We PONDER on what DIVINE knowledge says to us.
Mr sri sri sri
We all know that your work/service doesn’t come free free free
It’s not a Nobel Prize offer Mr sri sri sri we all know that, at the most, it might have been just a nomination for the prize, which are in hundreds and this information is for you for free free free
He is the no. one duplicate & feku. any one shake him well all his originality will come out. No doubt one day will be soon.
Master Ravi Jeeee First I Thought would have our Great Leader Master Scorer C T Ravi jeee he is right person to award Nobel Peace award. any way Sri / Siri says he was rejected and against to Ms Malala's selection, you all surely know very well, Malala totally un fit to award it but discriminated fools around the world chosen not Maste Narendra Modi selected Ms Malala because you all fools of this criminal minded world knows against of a group or de polarise the entire group. Sri Sri is good to magic man in this world making beautiful woman Fools.
Jai Hoo Narendra Modi.
They gave noble prize for Obama, for what???....I did not find any reason for it....Malala is an inspiration and hope for millions of underprivileged girls around the world...
Really... these awards should be given to Narendra Modi, Mohan Bhagwat, for their rolE to implement successfully Acche din in the country, if this award would have been given to Ravishankar could be better also...Now all are silent this fellow started Barking
Malala Yousafzai has done nothing to deserve Nobel Peace Prize
why did you congratulate #Malala two years ago if you don't think she deserved the @NobelPrize?
WHO CARES FOR U SRI SRI SRI ,
BEC U RAISED THE SLOGAN PAKISTAN ZINDABAD PLEASE GO TO PAKISTAN U HAVE NO RIGHT TO STAY HERE ANYMORE ....
I agree with him. I love Malal for her bravery, but when it comes to Nobel prize what was her contribution?
100% i Agree With Shri Shri Ravi Shanker....
After being shot in the head.. she is still fighting for the rights of girls and children.. you say that she is not deserving one.. then who deserves more??
Shri Shri Ravishankar please stop your non-sense,
This swamiji dont have any work simply putting nose to everything. if this swamiji dont want any award let him sit at ashrama, there is no rule to follow him,
Ravi shankar received padmavibhushana this year,
There is no Medicine for JEALOUSY. Dont waste your precious time try to learn about ISALM. And be prepared for your Future.
Dear Sri,
First pay the Pending TAX to the Govt then give the lecture.You did right thing of giving back the Nobel prize as you your self know that you really dont deserve.
He is a Man with Two Faces.
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