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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 2: Karnataka Health Minister B Sriramulu on Thursday launched the ICU Telecard, developed by CISCO to address the concerns of doctors treating coronavirus patients.

Wi-Fi networks and Cisco Health platform help to protect the entire medical team dealing with the infected person by ensuring that doctors do not have to be inside isolation wards and COVID ICUs.

The ICU Telecard has been installed at Victoria and KC General hospital.

"This technology is a necessity to safeguard health of our doctors and it should be implemented in all hospitals. We will discuss about this in the task force meeting and decide regarding the use of this technology in all COVID hospitals in the state. For now, we have installed one at Victoria and KC General hospital" said the minister.

Addressing the complaints of non-release of dead bodies without coronavirus testing, Sriramulu said: "Experts have discussed the same in a meeting with the Chief Minister yesterday, who has ordered for an increase in the number of testing labs. This should resolve the issue. We are also contemplating the conduct of plasma therapy in all districts."

The minister said that the government has also decided to reserve two ambulances for every ward to address the issue of non-availability and will procure more ambulances on rent if the existing ones are insufficient.

He further informed that those who were seen dumping the bodies in a pit in Ballari have been suspended and notice has also been served to officials in Yadagiri.

"We will ensure such instances do not repeat in the state," he said.

Bengaluru, Feb 28: Bengaluru Police Commissioner Bhaskar Rao on Friday said that Section 144 will be imposed near Vidhana Soudha for Budget session starting from March 2.

"Section 144 of the CrPC (prohibits assembly of more than 4 people in an area) will be imposed in the area around Vidhana Soudha from March 2 to March 31 ahead of the Budget session,"Bhaskar Rao said.

The police said that they have intelligence inputs of protests near Vidhana Soudha.