Politicians are like 'Dasaiahs,' says CM

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Newsroom, Jul 15: At least three students have committed suicide in different parts of Karnataka after failing in II PUC examinations, the results of which were announced yesterday. 

Bhumika, an 18-year-old girl hailing from Mallipattene near Arakalagud town in Hassan district killed herself within hours after the announcement of results. 

Depressed over her failure in the examination, she consumed poison, the police sources said. 

In a separate incident, 18-year-old Chitra, who failed the II PUC examinations, committed suicide at her native Chikkamarasa village in Shivamogga district. 

She was studying in Government PU College in Kumsi and after knowing about her result in the final PU exam, she hanged herself to death at her house.

Similarly, an 18-year-old boy from Harihar taluk in Davanagere district committed suicide in his house after the announcement of the PUC results.

Chikkamagaluru, May 9: Karnataka Minister for Tourism C T Ravi on Friday said that Indians who are stranded abroad are being repatriated into the country on the pre-condition of quarantine.

“The Centre is repatriating Indians who are stranded in around 37 countries, amid the lock-down, of which people from Saudi Arabia and Dubai will be brought via ship for free. These people will have to undergo the mandatory quarantine period once they land in the country,” Ravi told media here.

The government has accorded priority to the elderly and pregnant women during the repatriation process. The state government has held due discussions with the Centre in this regard, he added.