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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Assan, Feb 9: Coming down heavily on Amit Shah, JDS supremo HD Deve Gowda said that the Union Home Minister is dreaming of a Hindu nation. Addressing the crowd at an anti-CAA/NRC rally in Hassan, he said that the Home Minister has forgotten that India is a secular, multi-lingual country.

“Shah cannot make India into a Hindu nation. People should come forward and oppose the Acts in the interest of peace and welfare of the nation,” the former PM said, urging secular leaders to unite and fight against the undemocratic policies put forth by the Centre.

“Only secular forces can protect minorities by taking to the streets,” he said. Talking about the controversy around former Union minister Anant Kumar Hegde’s statements, Gowda said BJP leaders are airing anti-national comments, which is disturbing peace. “Muslims, Christians and Hindus should unite to fight against the BJP’s unilateral decisions.”

Bengaluru, Apr 10: A Karnataka BJP MP's daughter who recovered from COVID-19 has said she did yoga and ''pranayama'' while in hospital quarantine and these were key to defeating the pandemic.

"I was there in the hospital for 14 days. I used to do Yoga and Pranayama. It helps a lot. Everyone should start doing it now," said Ashwini GS, daughter of Davangere MP GM Siddeshwara.

In a video message that went viral on Thursday, she said coronavirus was "not something to be feared and yoga, pranayama and a strong mental state are the key to defeat the pandemic."

Ms Ashwini tested positive for COVID-19 after she had returned from Guyana last month. She was admitted to the SS Hospital in Davangere where she was quarantined for 14 days.

"Throughout my stay in the hospital I did not have any symptom of coronavirus. I neither sneezed, nor coughed or had a running nose. There was no fever either," Ms Ashwini said.

However, she kept herself physically and mentally fit.

"Maintain social distancing, be aware of dos and don'ts and stay safe," the MP's daughter said.

The AYUSH Ministry's protocol has outlined measures to build a strong immune system and it included consuming warm water, practising yogasana, pranayama and meditation for 30 minutes every day.