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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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what you know about HAJJ, first you try to learn your religion man you maron...you know in veda says there is no image of GOD, dont follow donkey, follow hindu scripture, first of all dont know what is hindu religion and goes to show finger on MUSLIM, look at you face in mirron and ask yourself do you following GODs religion or Devil religion...who is your god bootha or pure GOD.
dont act like maron of hindu community, think before comment, any thing happens to hindu then they blame muslim, what a joke,,there is saying that 80% dogs are worried about 14% lion in forest..haha
yo naresh, first try to learn veda the hindu scripture. which says there is no image of god..if you follow poojari then go to hell, who told muslims are not allowed, did you went any time to masjid to see how it is operated. you maron always behind bar and worship stone, how will your brain develop..first try to become good hindu then you can point muslim.
In most of the masjids having seperate place for woman also... better at least provide seperate way for hindu woman in temples to avoid mingling .... above judgement is on internal issue of hindu custom issue , why dragging muslims to it ?
According to North states' people and BJP people, there is a chance of flood again in Kerala, becuase SC challenged GOD. Those north state fools said that Kerala Flood was aftermath of Sabarimala verdict. Even RBI official backs the statement
Actually 99 percent of women in Kerala following the rule. They are waiting for their turn. Its like hajj. You people wont understand that. Some fools filed petition in order to destroy Hindu religious customs and traditions and muslim lawyer advocated for that. Now everything perished
Silly issue got more hype.
All bloody activists wants to destroy Hindu religion thats it. They won't raise voice against inequalities in Islam. They won't question their customs.
So called activitsts not protesting against inequalities among muslims. Why muslim girls cant enter in to mosque for offering namaz. Why they have seperate one.
Gender equality won
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