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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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She is the best External Foreign Minister india ever had. Lets pray for her speedy recovery. India need her badly.
Some sarcastic comments by our dignified readers are unwarranted, as an External Affairs Minster she is doing commendable job unlike her predecessor.
We need to learn to appreciate people irrespective of their political affiliation and/or faith. I pray to Almighty to give her good health to serve India and Indians living abroad for many years to come.
Prophet Muhammad pbuh taught us a beautiful DUA to ask with our CREATOR, who Created the heavens & the earth and all that is in between them.
\ O ALLAH, Lord of MANKIND ! Remove our suffering, Heal us as YOU are the HEALER, and None can HEAL but YOU. I beg YOU to bring about healing that leaves behind no Ailment....
Alhamdullillah (Thanks & praise is due to ALLAH) for guiding me on the knowledge that benefits in our LIFE.."
Poor lady..... the Isa visa issue will start haunting her....before that she wants to get herself admitted so that she donot have to face the media and opposition for ANOTHER BLUNDER by her team (first one was Lalit Modi visa)
She is doing a good job as a foreign minister....may God help her to recover speedily ...
oops ...MAY b terrorist attack on her chest...
Wholeheartedly Pray for Early Recovery. Sushma is one of the Best Foreign Minister in India, ever had. And wonderfully she is Human, though she is in BJP!
Let her go to England to get treated when Lalit Modi and Vijay Malia will pay the bill. Vasundra Raji will be her attender.
Why an VIP room of AIIMS is wasted for such unpatriotic people.
She is an able minister and wish to thank for her services to my nation. I do not see her political color but she has worked beyond the narrow confines of political outlook. May God bless her good health.
Hope this capable and very able minister recovers soon. best external affairs minister in india's history.
You are the pride of India madam! Let God give you all the strength !
She hardly does her job as a minister of external affairs since modi is doing all the travelling not giving her a chance to make her mark as mea. She is probably stressed out because of that.
Get well soon mam. Nation needs you!!
Get well soon madam.
Stress of The Job.
Disturbed to hear that EAM Smt @SushmaSwaraj ji has been admitted to AIIMS. Wish her speedy recovery & good health.
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