U T Khader’s health condition improves, to return to work soon

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jan 12: Janata Dal (Secular) chief and former prime minister H D Deve Gowda on Sunday refuted reports of him contesting in the Rajya Sabha elections and added that he is more concerned about strengthening his party in Karnataka.

"I am not interested in going to Rajya Sabha. My concern is to build and strengthen the party in the region to the best of my ability. I had declared earlier that I will not contest elections anymore," Deve Gowda told ANI here.

"My party MP D Kupendra Reddy is there in the Rajya Sabha as of now and further decisions will be taken by the party. In March 2019, towards the end of the 16th Lok Sabha I had declared that I will not contest any more elections," Deve Gowda added.

Four Rajya Sabha seats in Karnataka are about to fall vacant in June this year as two of Congress, one of BJP and JD(S) MPs retire.

Mangaluru, May 11: The first evocation flight from Dubai to Mangaluru amidst corona crisis is expected to bring back 177 stranded Kannadigas, mainly residents of coastal Karnataka, on Tuesday, May 12.

All the international passengers have to undergo three mandatory upon their arrival at Mangaluru International Airport - the thermal test, pulse oximetry reading and swab test.

They will be categorised based on their health condition and sent to institutional quarantine, said Sindhu B Rupesh, deputy commissioner, Dakshina Kannada.

“Those with some health issues on arrival (Category A) will be ferried through ambulances to quarantine facilities and rest in buses,” she said.

Arriving passengers will be given the option to choose their quarantine home (lodge, hostel and service apartment) based on their budget and preference.

It is learnt that Dakshina Kannada district administration has kept ready close to 1,000 rooms. The tariff for quarantine facilities is between Rs 1,200 and Rs 4,500 (including food) per day.

As per the Karnataka government, as on May 6, about 10,823 stranded expatriates are expected to return home.

The CISF, airport authorities, health and police departments will make arrangements for the arriving repatriates at MIA.

Sindhu said that the district administration has no personal information about the arriving passengers and there is high probability that they may belong to other districts or the neighbouring Kerala.

“So far, the district administration has received the missive that 177 passengers will be landing on May 12. If we are given advance details about the expats from other districts/state, the district administration will alert them to make necessary arrangements,” she said.