CET results announced; Ananth G from Alva's College is medical topper

Chamarajanagar, Feb 7: Health authorities in Karnataka have constituted a mobile team of doctors to monitor villages sharing a border with Kerala districts.

Strong vigil is being maintained by the health authorities in Karnataka after three confirmed cases of Coronavirus was detected in Kerala.

Kerala Health Minister KK Shailaja on Wednesday had informed that three positive cases of Coronavirus were found in the state and other suspects were being monitored in isolation.

The virus originated in Wuhan in December and has since then spread to various parts around the world.

China has imposed quarantine and travel restrictions, affecting the movement of 56 million people in more than a dozen cities, amid fears that the transmission rate will accelerate. 

Bengaluru, May 20: An owner of a hair cutting training salon in the city has given shelter to the jobless IT professionals and migrant workers hailing from north-eastern states and Nepal, in his salon.

Rahul Rai, the owner said, "The moment the lockdown started then I received many complaints from different corners that several persons became jobless and they were thrown out of their rented accommodations."

"They are from different states of the North-east and some of them are from Nepal also. I converted my hair-cutting training salon into a shelter home for them," he added.

A person who got shelter at the salon said, "I lost my job after the lockdown started. I was facing a lot of issues after my landlord had evicted me from my rented accommodation. I spent about a week nearby a lake. I managed to contact Rahul Rai through Facebook and he rescued me along with many others."

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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