NITK student drowns in sea after photo session at St Mary's Island

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jan 25: Karnataka Health Minister B Sriramulu on Friday, hit out at JD(S) leader HD Kumaraswamy, accusing the former Chief Minister of pursuing "vote bank" politics and advised him to move to Pakistan.

"It is better to move to Pakistan...if he shows so much love towards Pakistan, why should he live in India? He should not do dual politics like this. He wants to be fair to Pakistan and also to India," Sriramulu said.

Terming it as "double standards", the Minister said: "From so many years, you have been doing vote bank politics. You have to understand one thing...you are the son of former Prime Minister and also a former Chief Minister. By giving these type of statements, I think it will hurt the citizens of India. If you want to do vote bank politics I must suggest that it is better to leave the country."

His statement comes after Kumaraswamy took a jibe at BJP over its "obsession with Pakistan".

Mangaluru , Mar 30: Dakshina Kannada Superintendent of Police Laxmi Prasad on Monday suspended a constable attached to Subramanya Police Station for manhandling the chief priest of Kukke Subramanya Temple on Saturday.

According to the police, when the priest Srinivas Bhat was on his way to the temple to offer Puja, Prasad, a police constable intercepted him and enquired where he was going during the lockdown period and then charged at him with lathi on his hand and back.

The priest, then immediately filed a complaint at local police station, following which a complaint was also brought to the notice of Deputy SP of Puttur Sub-division.Please lo