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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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No words to speak after hearing the sad demise my favorate Mr. P.C.M. Kunhi. I met him last year in the month of April 2015 on my vacation in a programme. He spoke to me and asked about my wishes. Great Educationist, Academist, Philanthropist and wise man.
Helping hand for poor. I was with him in Yenepoya Dental College at Zulekha Complex, Bunder.
May Allah bestow him Jannathul Firdouse and Give him a cool and heavenly life in Barzak.
Aameen Ya Rabbul Aalameen..
Innaa Lillahi Wa Innaa llaihi Raajivoon. May the departed soul rest in peace. May Allah accept all his good deeds and forgive the sins. May Allah bless him with Jannah. May Allah give sabr ( patience ) to the grieved family to bear the loss of their dear one.
Heartfelt condolences.
our deepest condolences to the family members of pc kunhi,
we pray with almighty Allah give patience and strength to the nearest and dearest of all his family members, this is a great loss to all of us, once again we pray for the magfirah of departed soul of kind and soft man. Ameen
to Allah we belong and to Him is our return
our heartfelt condolences to the family members of pc kunhi . may Allah give patience, strength to all his nearest and dearest, the great loss of our family, my deepest condolence to all of them,
we once again pray with almighty for the maghfirah of departed soul of kind and soft man, ameen
Please accept our deepest condolences, \to Allah we belong and to Him is our return\""
Inna Lillahi wa Inna Ilahi Rajiwoon. Very sad and shocking news. We are with the aggrieved family
Inna Lillahi wa Inna Ilaihi Rajioon. May Allah grant him jannah. Indeed he was a great motivator. Hope his son Hashir will fulfill dreams of his father.
A great loss to the community and society. He was a role model for many. Despite his ill health he continued to fulfill his responsibilities.
Inna lillahi wa inna ilaihi raajioun. May Almighty Allah bestow with Jannathul Firdouse. A big loss to entire coastal muslims as well as for Islamic Academy of Education (Yenepoya University).
INNA LILLAHI WA INNA ILAIHI RAAJIOON.
The big loss for Muslim Community. He was the Correspondent of Badria College for decades.
May Almighty ALLAH bless him with Jannathul Firdous.
Inna Lillahi Wa inna ilaahi rajioon
The Great Academician, Educationist, Administrator,Philanthropist. the really big loss for the society, we wish him to take rebirth.
RIP, condolences to the family and loved ones.
RIP sir
wanaqalat shaqqana
unbelievable...really really hard to believe
Unbearable loss to the society “RIP”
Inna Lillahi Va Inna Ilaihi Raajivoon...
Inna Lillahi wa Inna Ilaihi Rajihoon. Allahummghfirlahoo warhamhoo whafu anhoo Yaa Rabbal Aalameen. May Almighty Allah bestow him with the Janathul Firdouse. ameen.
Inna lillahi wa inna ilayhi raji'un
inna lillahi wa inna ilaihi raajioun. we pray almighty allah to bless late.prof.p.c.m.kunhi, with his jannathul firdouse, aameen. our heartfelt condolences to the family members of prof.p.c.m.kunhi. may almighty allah give patience, strength and forbearance to all his family members to bear the brunt of bereavement. a soft spoken, well qualified civil engineer, educationist., academician and also an entrepreneur with humility. a very good footballer and a keen sportsman in his heydays. prof.p.c.m.kunhi, is closely known to us for the past 40+years., since his teaching days in krec-surathkal (now-nitk). particularly mangalore muslim community and others have lost a decent gentleman with high esteem. we once again pray with almighty allah for the maghfirah of the departed soul of this noble gentleman, aameen.
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