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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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The usage of Beary language in kuthubs, other than arkans in arabic, and in masjid and stage discourses should be implemented forthwith .It is a pity that Beary musliyars prefer malayalam as if it is the language of heavens ; having inferiority complex to give discourses in their mother tongue .The Beary community should persuade them to do so
Master Moorthianna well said, you must understand before commenting, Yes \your said KHUTBA must understand, you are 100% correct. but that places in US, EUROPE and SHARJAH. but in Mangaluru ( Kudla) ENGLISH??? to whom Anna??
Why can you suggest our favourites \"TULU\" !!!!! EVERY ONE UNDERSTAND WELL, local language.
Master Abu Wafaaaa!!!!!! you said Jingle bell like, should have been 50/60 Years back Baisabbbb.
Any way Good luck, at least avoid Mallus in Mangaluru, but do not copy them>
Jai hoo Hindustan
Jai Hoo Modianna."
Good move! this Historical steps should have been taken at least 10/15 years back so Malayalee ustadas divide the youth and rule policy as well they compelled their customs and tradition(which is not in Islam) in many areas from which many poor and middle class Bearys are still suffering may end before.
Urdu can be better....
Yes right ....in West like US and Europe ....Khutbas are held in English ...in Sharjah too its in English in one or two .....People must understand whats in Khutba ...instead just hearing
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