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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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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Now all like minded should unite and eradicate all the malpractices in the name of religion like :
- Caste system- Upper, lower, Dalit etc.....
- Praying multiple Gods, also praying to Devils, Ghosts
- Fortune telling like horoscope. These can be seen on many Indian TVs.
- Telling the man made stories - that God and giants fight and God is loosing.
- Madai snana in Karanataka,
- Devadasi system in most of the South Indian states
Generally, stick to Vedas and practice it. These are more convincing than man made other books.
The best thing is if you found practical and true, get and follow from other religions.
Where are Ram sena, Bajarangadal ,VHP,ABVP.......? Why not Hindu is ondu in this case. Why not crocodile tears in this case. Wake up fear real creator.
Prostitution Racket using God's Name.. Sick people. This is bcoz of false believes.. Gvt should enforce BAN on it. many poor girls are trapping under this false believes.
Would they agree with SC? May be the order has to come from Nagpur and its never going to happen.
TO those who are ARROGANT
ALLAH says in QURAN: O MANKIND, We have created YOU from a male and a female and have made YOU into nations and tribes for YOU to know ONE another. Truly, the noblest of YOU with God is most PIOUS. Truly, God is all KNOWING, All AWARE - QURAN 49:13
Islam REJECTS certain individuals or nations being favored b'cos of their wealth, power or RACE. ALLAH created human beings as EQUALS who are to be distinguished from each other only on the basis of their faith and PIETY.
Prophet Muhammad pbuh said : O people! Your God is ONE and YOUR forefather (Adam) is ONE. An ARAB is NOT better than a NON-ARAB & a NON-ARAB is not better than an ARAB, and a White person is not better than a BLACK person & a BLACK person is not better than a WHITE person EXCEPT BY GOOD DEEDS & PIETY.
Do YOU know even DALITS also should not be looked down.... If U guys continue to oppress people & did not recognise the true God surely HELL will be the destination. Please READ what God speaks its not just for high class.. everyone can access to GOD's word.
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