Anant Kumar Hegde fiasco a closed chapter, says Yeddyurappa

Bengaluru, Apr 13: Eminent scientist and NITI Aayog member V K Saraswat said on Monday the number of COVID- 19 cases is not going to go beyond what's being reported daily in India as he maintained that the country is in the process of flattening the curve.

The former Scientific Adviser to Defence Minister said the coronavirus positive cases have seen a sharper rise in the last four-five days because of increase in the number of testing.

"It's a good sign; all those asymptomatic cases lying hidden they are also coming out," Saraswat told PTI. "We certainly had a catalytic factor which was basically this (Nizamuddin) Markaz problem which has actually created clusters at different places and that has also been one of the factors for the kind of rise that has taken place."

But he said India is in a much better shape compared to other nations in the battle against COVID-19. "I can only say that the rate is not going to go beyond what has been going on now, may be 700 to 800 cases per day. So, we are in the process of flattening the curve."

The government's decision to declare nation-wide lockdown has paid dividends, Saraswat, a former chief of the Defence Research and Development Organisation, said.

Noting that India has seen a series of virus attacks in the last 15-20 years including Chikungunya and Dengue, he said the emphasis now should be on more and more R & D to find vaccines in advance.

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 15: The second evacuation flight from Dubai to Mangaluru is expected to bring nearly 180 stranded UAE Kannadigas on May 18.

Air India Express B737-800NG aircraft will take off from terminal 2 of Dubai International Airport at 1.30 pm UAE time and land in Mangaluru International Airport at 6.30 pm local time, sources said.

Mangaluru Airport had witnessed chaos when the first repatriation flight arrived on May 12. Now many passengers of the first flight tested positive for the covid-19.