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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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
The reason for the raid was that a girl belonging to another community was present in the room. However, after inquiry the cops returned as they realised that the girl was not only his classmate but was also his fiancée.
Comments
ALWYN,,,,THERE R SOME WHO WANT TO EXPLORE,,EVEN PARENTS ARE FINE ABOUT THIS BUT SOCIETY IS NOT ,SOMETIMES IT IS OTHERWISE,,,,ONE SHUD NOT INTERFERE TO THE CERTAIN EXTENT,,IN SOCIETY ONE SHUD KNOW HOW TO ACT AND TALK,,,,,ONE SHUD NOT HURT OTHERS,,,,LOVE JIHAD IS SERIOUS,,,THERE ARE INDIVIDUALS WHO DO IT FOR FUN,,,AND SOME FOR DEMEANING THE GIRLS REPUTATION AND SOMETIMES EVEN THE COMMUNITY,,,,,,,SOME SOCIETIES ARE VERY REGRESSIVE LIKE MUSLIM COUNTRIES,,,,,,OURS IS OK,,,ONE SHUD NOT FEEL EVERYTIME IT IS THE CASE,,,,,WHEN A COUPLE ACTUALLY LOVES EACH OTHER THEY SHUD BE ALLOWED,,,,THATS THE WHOLE POINT.......
Doorway to Haven AK47 please help us, many of our girls are victim of Love jihad, this is other example. we are help less
NO DC OR BC CAN STOP THIS,,,,,,ITS HAPPENING EVERYWHERE IN THE WORLD,,,,THIS TIME THE MALE WAS SAVED BECAUSE GIRL IS CHRISTIAN,,,UNTIL NEXT TIME,,,WEN GIRL IS HINDU,,,HE WILL GET IT FOR SURE,,,,,THEN WE WILL C WHAT DC DOES,,,,,NONESENSE PEOPLE TALKING COURAGE ON WEB FORUMS,,,ITS SO MANLY
Koti-an & other chaddis, BURNOL BODA
CHADDIGALIGE BURNOOL BAGHYA....
Shame !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! on dirty mind people...........
its not coming from their back ..its coming from Hindutwa Activists mouth
These shameless goondas have no job but to create disturbance in society. Police should book them for wasting time and trying to create communal disturbance. Arrest the leaders of these goonda parties.
One who act against country's CONSTITUTION and tamperning the rules and contents of CONSTITUTION and playing against law and attacking on any particular community or conducting group clash; igniting communal clash is a terrorist and Government and Supreme Court must announce to whole nation and implement.
Then no one dare to show off with DHARMA;SENA; BHAKT BRIGADE etc.
respected deputy commission,
dear sir,
it has been a practice in dakshina kannada that , the sangha pariwar goons always accompany policemen for any raid , which was complained by them.
why you need sangha pariwar goons along with your police men? your police men are not enough to handle the situation? or the police men are also involved in sangha pariwar activities?
this is specially when they raid \minority houses, church, mosque and commercial places only. entire muslims in dakshina kannada knows this routine. thus the minorities are losing faith in police.
kindly requesting your good selves to stop this practice to show that your team is capable to handle any situation, and your team is not supported by the sangha pariwar goons."
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