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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Apr 9: In order to stop fake forwards about coronavirus shared by some netizens which is creating hate and fake news, the Karnataka state police have launched a new section (landing page) of fact checks in the Karnataka State Police official website.

which is falsely framing a particular community by sharing photos and videos on social media by some netizens which is creating hate -- the Karnataka state police have launched a new section (landing page) of fact checks in the Karnataka State Police official website.

Bengaluru, Feb 28: “Those who struggle to come up can understand people’s problems better. Yediyurappa is one such leader who has reached this position after a struggle,’’ said former chief minister Siddaramaiah, in praise of Chief Minister BS Yediyurappa, who celebrated his 78th birthday on Thursday in Bengaluru.

Siddaramaiah was the only non-BJP leader on the dais, who not only attended the event, but was present throughout. He released a coffee table book, ‘A Leader who Saw Tomorrow’, on Yediyurappa’s life and achievements, compiled by The New Indian Express.

Dwelling on the political spectrum and human relationships, Siddaramaiah said, “Our ideologies are different, but that is limited to politics. Politics should not come between personal relationships.’’ Recalling his association with Yediyurappa, Siddaramaiah said that in 1983, he and Yediyurappa had entered the Assembly for the first time.

“Yediyurappa did not become chief minister just like that. It took years of struggle and hard work. We both have many similarities — neither of us came from political backgrounds. We came up through struggle and those who come from such backgrounds understand people,’’ he said.

Siddaramaiah said that it was Yediyurappa who first became chief minister, and he had reached the post only five years later. “I am five years younger than him, maybe that is the reason,’’ he said on a lighter note. Yediyurappa has become chief minister four times, but I have been chief minister only once, he added. He also spoke about how Yediyurappa had played an important role in bringing the BJP to power in the state, the party’s first government in South India. “Very few leaders know the pulse of the state and Yediyurappa is one among them,’’ he said.