Impact of Gulf job crisis on Kannadigas: ISF delegation meets Dakshina Kannada DC

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Apr 15: Police on Wednesday conducted surprise raids at nearly 120 shops in Bengaluru following complaints of black marketing and sale of foodgrains above the MRP rate.

Sandip Patil, Joint Commissioner of Police, Crime, Bengaluru in a tweet said that action has been initiated against these shopkeepers.

Though the government has maintained the supply chain of essential items, few shopkeepers have used the lockdown opportunity to charge higher prices for essential items.

Bengaluru, Mar 5: Karnataka chief minister BS Yediyurappa on Wednesday admitted in the legislative assembly that corruption was deep-rooted in government offices and held transfer racket as the root cause of the graft menace.

“Unless we root it out from the system, we can never uphold the spirit of the Constitution and ensure equitable justice to people. If legislators lend support (to this cause), then we can weed out this menace,” Yediyurappa said during a special discussion on the Constitution.

Successive governments have been accused by opposition parties of running a transfer racket, but there’s very little done to institute a probe or order a crackdown following the allegations.

The chief minister’s candid admission came after senior Congress MLA HK Patil, quoting a report from Amnesty International, said 63% of people in Karnataka give bribe to get their work done in government offices. The CM said he agreed with the report in toto.