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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
We pray to ALLAH, for your quick recovery
May ALLAH Help you
All the best Mr. Bava!
Bawa ka Eer daane mool?
Yaan moole Yereg aauwuye kiri kiri Car d popina
Mool ragaale ijji selfie geppuni jappuni hahaha.......
Whatever may people say.... Mr. Moideen Bava is able bring a lot of money from state govt or central govt. to his region...and works are in progress. I am not aware of much in politics, but Bava's smiling Photos we can see everywhere (especially in Krishnapura)...and he is a happy man. His smiling face even in the hospital is some thing explains what is \Moideen Bava\". I pray for a speedy recovery. Let him learn more and take interest in helping all poor people of his region whatever may be their religion (Hindu, Muslim, Christian....all.)"
KEEP HOPE ON ALMIGHTY AND HE WILL PROTECT YOU FROM ALL OBSTACLES AND HINDRANCES BY PROVDINDG SERVICES TO THE PEOPLE HONESTLY.
WISH U SPEEDY RECOVERY.
Oh we can see comments from tolerant guys here..
We wish you a speedy recovery bhai.. May Allah protect you and all muslims from all evils.
our prayer are with u MR Bava u have done very good work for surathkal blessing from poor people is always with u
GET WELL SOON
Moideen Bava a Great Personality !!!!!!!!!!! u got 100 crores people blessing.
all goes well, praying for u always.
get well soon bava ji...
our MLA moideen bava we are proud to have u here in our constituency. we expect more good work from your side, for that u have to be healthy and smart. praying always for u, get well soon, will try to visit hospital.
Big Fraud !!!!!!
nobody can do anything to bava as far as we are there, look like bjp is jelousy on bava, may be their is hand behind of this incident
Really sad to hear this, get well soon bava we are with u, u have done very good development work in our locality. we are always kind to u.
ohhh really tragic incident look at the car... praying for speedy recovery of bava kaka.
just missed !!! next time bava be careful :).
ohh bava!!! allah is always with u... people's dua will save u always from all the incidents, keep the good work up, Please careful next time, change the driver soon,
our prayers are with u bava, u have done very good work in surathkal locality, poor people's blessing is always with u, get well soon
Avoid Hitting a pedestrian, pedestrian kathe govinda.
Rash driving caused this accident, Moideen Bava Should be charged.
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