SDPI observesBlack Day' against note ban; forms human chain

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 8: The 'Shuka Vana' (Parrots Museum), in the sprawling Sri Ganapathy Sachchidananda Ashrama here, will remain closed for 15 days from March 9 as a precautionary measure following COVID-19, Ashram authorities said here on Sunday.

Ashram authorities told UNI that the Museum will be closed due to threat of spread of Coronavirus. This is for the first time that the Museum has been closed for such a long time earlier it had closed for one or two days due to bird flu. The decision has been taken following the tourists and devotees including foreigners are arriving to Ashram in large numbers.

The ashram authorities have also closed famous The Kishkinda Moolika Bonsai garden on-premises for same reason.

Bengaluru, Jul 19: A man protested in front of Karnataka Chief Minister BS Yediyurappa's residence on Saturday alleging lack of medical care claimed the life of his one-month-old infant girl, police said on Saturday.

Venkatesh sat with the baby's photograph in front of the Chief Minister's house, saying the girl developed health issues on July 11 and he rushed her to a hospital, but it turned him away, the police said.

He said he had approached about a dozen hospitals and all of them refused to provide the baby any medical care. Eventually, the baby died.

This forced Venkatesh to hold a protest to draw the Chief Minister's attention to the issue, the police said.

The demonstration drew public attention and a few people joined him in the protest, they said.