Secular parties must unite at national level to defeat BJP: Siddaramaiah

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Apr 3: The laboratory at District Wenlock Hospital has initiated trial for Covid 19 testing, close on the heels of receiving permission from state government.

Doctors, elected representatives and stakeholders had repeatedly demanded that a laboratory should be set up in the port city. Without the lab, the samples were sent either to Shivamogga or to Bengaluru for testing. When Heath Minister Sriramulu had visited Mangaluru on March 17, he had promised a lab in the city for testing of the samples.

Accordingly, the government gave permission for starting the laboratory at Wenlock Hospital. The process of registering the lab with Indian Council for Medical Research (ICMR) will be completed shortly. The laboratory will be fully operational only after it is registered.

Bengaluru, Apr 22: Former Chief Minister and the Opposition Leader in the Karnataka Assembly Siddaramaiah appealed the state government not to discriminate the poor on political lines while distributing relief package to the COVID-19 affected people in the state.

He was speaking to newsmen after attending a grocery kits distribution programme, organised in Jayanagar Assembly constituency, which was represented by the Congress MLA and former minister Ramalinga Reddy.

Charging that there are complaints about the state government in discriminating the Congress MLAs represented constituencies in providing relief kits to distribute among the poorer sections in the society, he said that “there should not be no room for politics, while fighting the COVID-19 disease”.