Anant Kumar Hegde suspects attempt on life after truck hits his escort vehicle

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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: The India Meteorological Department (IMD), Bengaluru Director CS Patil said that good rainfall is expected in few districts during next five days.

The districts likely to receive rainfall include Dakshina Kannada, Shivamogga, Chikkamagaluru, Hassan and Kodagu. All these districts had received deficit rainfall till date from June 1.

"From June 1 to till date Dakshina Kannada, Shivamogga, Chikkamagaluru, Hassan and Kodagu districts received deficit rainfall. However, there is an expectation of good rainfall in these districts in next 5 days," said CS Patil.

"Coastal districts are very likely to experience light to moderate to widespread rainfall activity during the next five days," he added.

Bengaluru, May 12: Nurses are the frontline warriors in the fight against COVID-19 and their commitment towards duty is commendable, said Karnataka Chief Minister BS Yediyurappa on World Nurses Day on Tuesday.

The Chief Minister was speaking at the inauguration of Miss Florence Nightingale's bicentennial anniversary organized by Rajiv Gandhi University of Health Sciences at his home office 'Krishna'.

The Chief Minister said that the care and service provided by the nurses enhance the chances of recovery for any patient.

"In spite of the stress and pressure they go through everyday, nurses render quality service in the providing healthcare. There is an enormous demand for nurses around the world. I appeal to nurses to continue to render their quality service in this fight against COVID," he said.

Speaking at the event, Medical Education Minister Dr K Sudhakar said that the nurses are the backbone of the healthcare services and their role in the fight against corona is so large that the whole system would have gone for a toss without their services.

The Minister said that the Nurses have been renamed as Nursing Officers in recognition of their service.