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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
Responding to queries of media persons regarding the anti-hijab agitation in some colleges in the state by Sangah Parivar backed students, the minister said thathijab' should not be identified with any religion.
Comments
Sreenivasa for you if u say all muslims goto GCC country to follow the rukes of islam thn were you will send the to the rajsthani women everyone cover there head even we cant see there face until they show there face and even many hindus also use to cover there head with there saree and were you will send thm can you tell me whn you people do pooja u also cover your head with ur saree or duppata wht abt tht were you will send GCC or the other country do u have dont blame other religons they do wht they blive india is not made only for RSS and hindus india is of maltiple religon and maltiple caste and multiple festivle dont blame others b like a brother if u cant let others live like brothers dont try to do brain wash of good hindus ok
@shrinivas.
That means Sita mata is Muslim. we can see that Sita Mata is wearing hijab in all her pictures and idols.
Dear Srinivas, the comments from your side shows how much childish you are. If eductaed, they will utter these type of words. India Is the country for all religon and practicing their faith is given to every one by constitution. If you think that you are not happy with this , you can search for the place of your choice , where you can practice your faith. So don't try to misguide the people. Simply relcoate yourself to the place where you can practice your religion. India is not suitable for people like you. Because in india every one want to live togtehr. If we united we can develop. If we devided we will perish. That what otehr countries want with india.
@ Srinivasa, why you people are wearing threads around wrist and Panganama on foreheads.... Any one is opposing... that is your culture and ideology .....Dear Sini, have you checked the reality... have you seen girls covering their faces in the CLASS ROOM
@srinivaasa. If Hindus want hindutwa and blah blah blah let them go to Nepal. India is the country of Muslims, Hindus, christian, and many more .. in short it's the country of Indians. And coming back to sharia.. it's the constitution rights what Muslims
whether you take it as positive or negative, my comments upon the subject is: Dear non hijab ladies, Kindly don't start to wear hijab. you want to expose your figures to public and public simply enjoys it. i too feeling lot of things in my mind. it just because of you only force me to think such manner. specially young ladies (College Students) whoever not wearing hijab please don't wear. if you start wear it is very boring to come out from the home.
Good move from the education minister, thank you sir. India is a secular nation and anyone can follow their own tradition and custom.
@Sreenivas, dont provoke the matter, instead of wasting your time in getting yourself provoked please understand with any good muslim person about Sharia Law by that you will come to know what Islam is and what it teaches, you said to follow sharia we should go to muslim countries (LOL). Everywhere you find Islam you will find sharia law. My brother please dont provoke any matter and dont come to conclusion soon.
Such issues began only after communal force came into power,
If sita mata can wear hijab. Then all hindu womens should wear hijab.
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