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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
Mangaluru, Mar 24: Two college students were arrested by the police in Puttur taluk of Dakshina Kannada for allegedly posting pro-Pakistan slogans during T20 cricket match between India and Pakistan.
Comments
Shame on Indian police for registering this kind of cases as even they know this has no basis in constitution.
they supported a cricket or sports team... even I supported UAE Team..I have my right to support any sports team..
PLEASE SEND SRI SRI RAVI SHANKER TO PAKISTANN PLEASEEEEEEEEEEEE
IF HINDHU SAY THAT IS NABOUR CONUTY
IF MUSLIM SAYS HE IS TERROR ACCHE DIN WHA WHA /.
Hope all have gone through below news about shouting slogan in favor of pakistan by Sri Sri ravi shankar ... why you people have not commented on that ....
Pakistan Zindabad....india belong to muslim they ruled for 1000 years, we will take back glory soon.
Mohan; Sharvan, Preethi, Meghana...
Please open your mind and dont fall trap over & over on cheddi media... if You try to accept whatever said in the media again & again even after knowing their LIES ... What should we call U guys...
Dont just make Howdu basava howdu ... for everything which is said in the media ...Use your God given intellectual and stop supporting the aggressor ... cos a day will come when the one who gave this life will account for our deeds done in this LIFE... So stop supporting the aggressor without true knowledge which U might regret later ... as many regretted after becoming voilence with a false statement from the cheddi leaders
Yes these students does not know about what they are talking.
They should be kept behind the bar.
By the way what happened to SRI SRI art of living Swamy who said Pakistan Zindabad??? is he arrested.??
Indians can support any country in any game but when any match is having indian team they should support only india.
@ MEHHNA , PREETHI ,SHARAVAN, MOHAN, KARTHIK ,,
YES WE NEED TO PUNISH THEM HARD , SEND THEM TO PAKISTAN.. EVERYTHING WE WILL DO WT U SAID
SRI SRI SRI RAVI SHANKER SHOULD GO TOGETHER WITH THEM, WE WIL BOOK 3 SEATS IN FLIGHT L
Constitution did not tell citizens to support only Indian team. There is no law saying that, then why on the hell police arrested those innocent people and under which law. In a democracy you have right to chose or support any one you want. Its not a big deal. Pakistan is not our enemy at all, Modiji without informing anyone met Nawaz Sharief, Pakistani PM. It happened because of our friendliness with that country.
I am a good supporter of our Indian team but it does not mean that I impose same on other fellow Indians too.
Grow up guys.
When SRI SRI Shankar said Pakistan Zindabad no action, no arrest,
when a muslim said he is arrested.
INCRIDIBLE INDIA ! WHERE SRI SRI CAN CALL PUBLIC MEETS ! STUDENT JUST TYPED IN WHATSAPP THEY ARE ARRESTED !!
WHEN IS SRI SRI ARREST ! ??????????????/////
if they raised slogans in favor of our arch rival, than take strict action against them. But Please don't touch Desh Bhakt like Ravi shanker !
Send Sri Ravishanker along with Two students from puttur to Pakisthan...Law should be equal for all.Do not bring religion in between.
there is no muslim commentors now ... these two terrorists must be kicked out of india along with their families ... soole maklige they want all benefits here and loyalty to pakistan ... no mercy for these animals .muslims here give big lecturer about religion , but they dont teach manners and basics for their community members .
Yes Mohan should send them pakistan with Ravi sankar...
DEAR PRO-CHADDIS.....
WILL YOU SEND ME SOUTH AFRICA AND ENGLAND IF I SUPPORT HASHIM AMLA AND MOEEN ALI?????
WHEN YOU WILL SEND SRI SRI RAVISHANKAR PAKISTAN FOR CHANTING PAKISTAN ZINDABAD???? WHY NO ACTION ON HIM????
serious action must be taken against them. india the country of peace loving and this type of people misunderstood us for being soft, one thing always should be on head that how much soft we are double to that we could be hard rock.
Pakistan zindabad is slogan of owaisi chaddis. not Bharath matha ki Jai
Now a days its common, need to give proper punishment next time they have to think hundred times before calling this.
both student must be sent to the pakistan, the two dogs of pakistan
me before india started batting: hahahaha we got this wtf pakistAN ZINDABAD
me now: we are brothers and sisters we both win in 1947.....
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