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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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Elite Indian nationalism defined: Every elite Indian can give his/her life for learning English if he/she needs to live in New York or London. But no elite Indian will sacrifice even a penny for learning Kannada if he/she needs to live in Bengaluru. Nationalism of jokers is always like that. (There are some rare exceptions to that, of course).
Look at how much useful English has been to India: India is one of the worst countries in education; the most starved country; suffers trade losses of more than 40 billion US dollars each year with China alone (I hope you know China doesn't teach in English); ranks 150th in per capita exports; administratively the most stupid one because administration is being carried out in language whish people don't understand; Also read this quotation from a worldwide study carried out by UNESCO, ‘What seems to be standing in our way is a set of myths about language and learning, and these myths must be revealed as such to open people’s eyes. One such myth is that the best way to learn a foreign language is to use it as a medium of instruction. (In fact, it is often more effective to learn additional languages as subjects of study.) Another is that to learn a foreign language you must start as early as possible. (Starting early might help learners to have a nice accent, but otherwise, the advantage goes to learners who have a well developed first language.) A third is that the home language gets in the way of learning a foreign language. (Building a strong foundation in the first language results in a better learning of additional languages.) Clearly, these myths are more false than true, yet they guide the way policymakers tend to think about how speakers of other languages must learn dominant or official languages.’ I will like to discuss with you further Mr. BigZero. If you agree, mail me at [email protected]
Can anything be more anti-national and educationally more stupid than what these 'Crazy' Board of Secondary Education people are saying? Kindly give your arguments if your answer is in Yes. Today itself, I stated in my TV interview that I don't find any education Board educationally as illiterate as the Indian 'Crazy' Board of Secondary Education. This is one more evidence of their illiteracy. I have mailed to the CBSE sataraps about their illiteracy on educational matters. But they never replied.
ಕರ್ನಾಟಕದ ಮಾತೃ ಭಾಷೆಯನ್ನು ಉಳಿಸುವತ್ತ ಸರ್ಕಾರದ ಹೆಜ್ಜೆ. ಸರ್ಕಾರಕ್ಕೆ ಅಭಿನಂದನೆಗಳು....
I find this interesting: "It is not a prestige not to learn Kannada...". Unfortunately,
many "elites" speak in other Languages - particularly in English - to show off.
There are problems with Kannadigaas too - we can't speak Kannada
without 80% English in it....
Court must be moved to knock out a ridiculous order. Language is correctly the choice of schools, parents and students. And students should not be burdened to learn languages that will have no use to them.
Karnataka govt. should close these schools if they refuse to comply.
When Hindi & English are mandatory and they did not make a hue and cry against these, what is their problem teaching Kannada in Karnataka?
UP-Bihar's Hindi language mandatory in Karnataka is OK, but not Kannada? What kind of nonsense is this?
@Ravi: Very correct and logical. Moreover, Karnataka and Kannada have been
taken for granted, by most of the people from outside.
People who don't want to learn Kannada in Karnataka and want to treat this place just as a safe haven for jobs, property and weather should leave the state. We have enough freeloaders here from all parts of the country resulting in the chaos in the city. Its time for the Govt. and Courts to tighten the strings.
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