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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 13: Coastal district of Dakshina Kannada today reported a fresh covid-19 positive case. According to sources, this case also linked to Manglauru’s First Neuro Hospital, which has emerged as the corona hub of coastal Karnataka.

Health and Family Welfare department in its today’s bulletin revealed that a 38-year-old woman from Darandabagilu near Someshwara in Mangaluru taluk of Dakshina Kannada was tested coronavirus positive.

It is said that the woman was in touch with P-507, an octogenarian, who was being treated for neurological issues at First Neuro Hospital.

With this the total number of coronavirus positive cases reported in Dakshina Kannada rose to 34. Among them only 26 are residents of Dakshina Kannada. Four are from Kasaragod, three from Udupi and one from Bhatkal.

Among 34, currently there only 17 active cases. The condition of two among them is said to be critical.

Bengaluru, May 29: Chief Minister B S Yediyurappa and BJP State President Nalin Kumar Kateel will resolve any differences of opinion among party leaders in Karnataka, according to Minister of State for Railways Suresh Angadi

If anybody has any issues, they should get them resolved by talking with Yediyurappa and Kateel. Internal matters, if any, should not be discussed in public, he said.

Angadi told reporters here on Friday that differences of opinion among party leaders have not come to his notice. A section of party leaders assembling for dinner should not be constituted as a meeting of dissidents. BJP has internal democracy and any differences of opinion if exist will be resolved at the party forum.

He added that if MLA Umesh Katti has any issues regarding cabinet berth or regarding assurances given to him by Yediyurappa during the Lok Sabha elections, he should talk with the chief minister.

Everyone in politics has aspirations and it's natural. Those aspiring for the upcoming Rajya Sabha elections should talk with the chief minister or the state president, he said.

Ramesh Katti was former MP and there was nothing wrong in him being aspirant for Rajya Sabha elections, he said.

Angadi said, "Party is supreme. We shall work for the victory of party candidates irrespective of who they were".

A state cabinet meeting was held on Thursday. Many of the MLAs too had been to Bengaluru for constituency-related works. As they had been meeting after a long time, all gathered for dinner, he expressed.