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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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Hahahaha wat a jock reality Manglore....! How could u say Prathima means image ...who said that Prathima means idol or image ...dont be confused and don't confuse others ..... Firstly u have written it in Sanskrit language it clearly says na tasya Prathima asti ...it simply means there is no one equal to god ...! As a Sanskrit student let me clarify you that even Hindu girls names are like shwetha,Prathima ,Jyothi etc .... Prathima means not image or idol it simply means here no other beautiful girl equal to this girl ....prathima means equality...let me clearly tell you another thing swetha means white ...but we can also name a black girl as swetha .....!it simply represents purity as white ..... ..i know how you guys are ...its all written in our bhavishya purana about every era
Instead of complaining they should check the VEDAS first and follow how vedas says to worship . That is the core scripture of hinduism, people are diverted from decades from the scriptures and mindwashed to follow the cheddis version of hinduism which is against Vedas of worshiping one god without the image or idols.
Police, you are right....May be ----Some miscreants have used a Muslim name to disrupt peace like Bhatkal Meat / Nagabana case......Who ever may have done this mischief, his both hands should be cut .....
CD please don't twist the facts. His name is \Jabbar Kudroli\"."
NA TASYA PRATIMA ASTI... It means telling the TRUTH that there is no image of God and the people should stop worshiping the man made objects instead Search for TRUE GOD , who created U ME and all that exists... Did U ever questioned Y vedas asks not to worship Idols...... Please read and understand what is TRUTH and What will happen if U worship the man made objects...
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