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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
Comments
I think kateel had good new year celebration along with mithun rai.... free alcohol was supplied by mithun rai.....what you say guys????? lagta hai daaru kuch bohat hi zyaada hogayi thi raat me....daaru ka nasha utra nahi hoga....isliye agle din subah aake kateel ne apni dil ki baat keh di.....wo kehte hai na daaru ke nashe me aadmi ke muh se sach nikalta hai
Think twice before u speak, is a famous dialogue which clearly suits Nalini Kumari Kateel.. Mike mila tho pagal bhi gaane lagta hey,,
He is not fit for MP.......should be removed.....
Nalin is lying that he was not well. He uttered what bjp and sanghis have planned. Nothing can be hidden for a long time. this is hidden agenda of sanghis to create trouble in karnataka and costal districts in particular. Police should arrest him under goonda act. He should be removed from MP post as he is unfit for this responsible position. Suprement Court should order central Govt to take notice of this dangerous statement from an MP and remove him from this post. In case Nalin is mentally sick, admit him in a mental hospital.
for instance if this was happened from one of our muslim brother, what would be the reaction and action from these sanghis????? even from chaddi police dept......
ha now we came to know that you are bad mental mp of our dk dist. shame on you. you must resign immediately.
New year night \ raathre paad dina onchooru jaasthiathund\" - mallajjappa powad.
Ancha namma modi 15 lakh niklena bank gu paadwe panthijja..... Anchane indula..
Thoo paadare inbe daane lankeda hanumanthena?"
Hahaha...pukkele...
Typical coward sanghi...
The nation wants to know whether you are really not well or the frog inside well?
No need to give clarification just put this man behind bars. Useless MP
Pradeepji, NOT Wenlock, Kankanady Permanently.
Such goondas are fit to be encountered ....
Yes true he is not well... this all unstable people belongs to BJP/RSS, They dont know what they are speaking after all, all are the followers of chaiwala, what we can expect from this RSS goondas...this marle minister even dont know to speak in parliment, he drinks spit twice before he delivers a word
If he is unwell, admit him to Wenlock
This is the fact and sanghis real mentality. Now he may accept his threatening to set fire his own constituency, message is out in public.
Every anti-national will say the same thing when press conference even Thogadia....Shame on you as a MP of our beloved Dakshina Kannada. Did the people elect you to disturb the area & set fire .. Thooo ninna....
Anna kadle baipinanda thoo malpode, E thoo malpu bokk kadle baipundu.....
why didnt police arrest him, he is enticing people to create violence, why no suo motto on him.
such people should be booked under goonda act
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