Congress will return to power in Karnataka: says DK Shivakumar

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 25: Former Karnataka Chief Minister Siddaramaiah on Friday said that the ministers of the BJP-led government in the state avoiding a judicial enquiry into the alleged corruption in procurement of medical essentials "is their height of arrogance".

In a series of tweets, Siddaramaiah said, "Why is the government afraid of judicial enquiry on corruption in procurement of medical essentials? If the ministers are so clean, what is holding them back from initiating investigation? This is their heights of arrogance!!"

He said that there should be a judicial enquiry by a sitting High Court Judge to let people know the facts.

"We will submit our documents and let the government submit their documents. If they are confident, why are they reluctant to initiate an investigation?" Siddaramaiah asked.

"Statment from the PMO says 50,000 ventilators are procured at a rate of Rs 4 lakhs per unit. Is this not true? Will Karnataka BJP ministers say that ventilators under PM CARES are sub-standard and lack quality?" he said.

"There will be both basic and premium models in everything. Even the PMO could have bought Rs. 18 lakh worth ventilator. Why did they buy a Rs 4 lakh worth ventilator? What is the justification from ministers for this?" he questioned.

Siddaramaiah asked that if the Medical Education Department sent a proposal worth Rs 815 crores which is not recomended by experts.
"It is true that Medical Education department has sent a proposal worth Rs 815 crores. It is also true that there is a note on the proposal which says that these are not recommended by experts. What is the significance of this note?" he tweeted.

The former Chief Minister said that if the state government is saying that if ventilators were procured during the tenure of Congress-JD(S) government, they must produce the proof.

"They are accusing us for the ventilators procured during the coalition government. I was not in the government then. If they have documents, let them investigate about that also. Let the truth be revealed," he said.

The Congress leader said that the opposition is not interested in playing politics during the time of COVID-19 pandemic.

"We are not interested in doing politics during COVID-19 pandemic, which is why we have not taken up many other pressing issues. But how can we be quiet when hundreds of people are succumbing due COVID-19 mismanagement?" he asked.

Karnataka on Friday reported 5,007 more COVID-19 cases and 110 deaths. The total number of cases in the state stands at 85,870, including 52,791 active cases and 1,724 fatalities, said the state government's bulletin.