Class 10 boy kills self after failing home test; brother, parents too commit suicide

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jun 12: Karnataka Medical Education Minister K Sudhakar on Friday said experts have indicated a surge in coronavirus cases in the state after August 15 and the government was taking all precautionary measures in that direction. Speaking to reporters in Ballari, Sudhakar said, "About 97 percent of over 3,000 active cases in the state are asymptomatic.

Experts after studying the developments in other countries and states have said that there will be a surge in infections after August 15."

He said the government was taking all precautionary measures in that direction.

 As of June 11 evening, cumulatively 6,245 COVID-19 positive cases have been confirmed in the state, which includes 72 deaths and 2,976 discharges, the health department's bulletin said.

It said, out of 3,195 active cases, 3,185 patients are in isolation at designated hospitals and are stable, while 10 are in ICU.

Meanwhile, in a tweet pointing out that nearly 60 per cent of the COVID cases in the country are from 10 cities, Sudhakar said, despite being the fourth most populous city in the country Bengaluru has been successful in containing its spread.

"Nearly 60% of total COVID-19 cases in India are found in 10 cities. Despite being 4th most populous, Bengaluru has been successful in containing spread of virus.

I urge people to keep up the fight, continue vigil & together with #CoronaWarriors we can defeat the virus," Sudhakar tweeted.

Bengaluru that does not figure in the list of 10 cities shared by the Minister has reported 581 coronavirus cases till last evening, out of which 258 are active.

Bengaluru, Apr 16: Former chief minister HD Kumaraswamy had said that his son Nikhil's marriage ceremony will take place at bride Revati's residence in Bengaluru, however, the wedding preparations are also going on in his farmhouse at Ramnagar.

This comes amid the lockdown in the country due to COVID-19 outbreak. The farmhouse is located at Kethaganahally, near Bidadi in Ramnagar.

Kumaraswamy has said the marriage will be simple and only his family members will attend and no one from outside would be invited.

Earlier Kumaraswamy has said that his son's marriage will take place on April 17 at bride house.