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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
As he is journalist, he might have some sense.
We Muslims have the guidance from our prophet (Peace be upon him) in all aspects of our life.
Kuffar of Makkah, Taif have hurted him, troubled, though suffering lots of troubles he has set example of not retaliating them. He has slowly convinced what is true message, what is truth in it.
As he is journalist, it is not difficult to convince him the message of Islam. Usually most of the journalists are brave and they remain strong with truth. He is also from Kodagu. Try to meet him and debate with him on Islam. If Allah bestows him Hidayat, he might understand true message of Islam and accept it. We have example of Omer Bin Khattab - may Allah pleased with him.
"Madiddunno maaraaya" gaade maathu tilidirabeku
still 80% majority dogs in forest think that 17% lion will kill them one day..he is scared now!!!LOL
dont hurt any religion, all are good but people who become manager of god are very vrey bad.
if you want to do money, do in good way not by spilling venom about other religion. even if road cleaning also, that you will earn respect in front of GOD.
Assure God faith peace loving people will never do such threats. This is pre-plan and this fellow was tapped in the net. Now facing life threat by his in house people. This is their HQ conspiracy to destabilize the las and order and innocent publics normal life. After their god fther recent city visit their groups noted leaders are now in full pledge with their criminal mind set. All peace loving Kannadiga including Mr.Thammaiah and his family has to be carefull.
Such criminl incidents will appear more and more till 2019 election.
If you are a true follower, Nobody can hurt religious sentiments. Unwanted issue. He should be released. and he need protection also
He should be punished properly. He hurt religious sentiments and some media supported to that. They hid real facts.
Fake. Media worked for him. Now he cooked up new story
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