Anupama slams govt for dropping VSP from Cabinet; seeks Pejawar's blessings

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Jul 20: Janata Dal (Secular) leader HD Kumaraswamy has urged the Karnataka government to stop putting warning signboards in front of COVID-19 patients' houses alleging that they are leading to "social discrimination and untouchability" in the present times.

"A local government warning signboards in front of the homes of COVID-19 infected people is leading to neo-social discrimination and untouchability in the new age. Even after infection, the individual and family should live with dignity. The government should immediately stop the practice of placing signboards," Kumaraswamy's first tweet read.

"Instead of placing them in front of their homes and creating untouchability, send health workers to their homes to create courage and awareness. They should be told not to leave the house. There is no such degrading practice left behind. I would like to ask Chief Minister Karnataka BS Yediyurappa to pay attention to this," he added.

The former chief minister further said that threatening to cancel the licenses of medical colleges for refusing treatment to patients would not solve the problem and urged the government to take them into confidence instead of rebuking them.

"Refusing treatment is the fault of any hospital. But for the same reason, threatening to cancel government medical college licenses is not right. There is no profit in this emergency of health. MCI also has the power to revoke the licenses of medical colleges. Remember not the government," he said.

"In this case, the government should look to the Medical Colleges to get their services in order to get them to trust them instead of getting angry. Let them focus on meeting their needs. I insist on a collective fight against the coronavirus through this," he further added.

The COVID-19 count in Karnataka reached 63,772 on Sunday, including 39,370 active cases and 23,065 cured and discharged patients.