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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mysuru, Feb 26: Twenty-nine students of the Government Primary School fell sick after consuming milk supplied at the school on Wednesday morning at Kiranguru village, in Hanagodu hobli, in the hunsur taluk in the district.

Police said the students were immediately rushed to the primary health centre in Hanagodu and provided first aid.

Tahsildar and Police personnel visited the health centre and inquired about the health of the students. "All the students are responding to the treatment," sources said.

Bengaluru, Jul 7: Vasudeva Maiya, former CEO of Sri Guru Raghavendra Co-operative Bank, was found dead in his car in Bengaluru on July 6.

The Subramanyapura police have begun an investigation into Vasudeva Maiya's death.  Source said that he committed suicide. He was a native of Kota in Udupi district.

The car was found parked a little away from Maiya's house at around 6.30 pm on July 6.

The Reserve Bank of India (RBI) had in January imposed restrictions on Sri Guru Raghavendra Co-operative Bank and limited withdrawals to Rs 35,000 by customers.

On June 18, Anti-Corruption Bureau (ACB) raided five offices of Sri Guru Raghavendra Co-operative Bank, in relation to alleged misappropriation of Rs 1,400 crore.

The RBI, Enforcement Directorate, Criminal Investigation Department, and Registrar of Cooperative Societies are looking into the financial irregularities at the lender.

The police also conducted searches at residences of Maiya and the bank's chairman K Ramakrishna in relation to the above mentioned case, sources said.