Water scarcity: DC orders suspension of constructions for 15 days in Mangaluru

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Mar 14: Following the footsteps of the neighbouring state Kerala, the state government has decided to deliver groceries to the mid-day meal scheme beneficiaries at the anganwadis.

The state govt has also declared one-week holiday for anganwadis, as a precautionary measure to control the spread of COVID-19 among children.

The respective district administrations have been directed to take necessary steps to ensure that the groceries are delivered to the students’ homes as well.

Bagalkote, Jan 27: The bank of Krishna River in front of Sangamantha Temple at Koodalasangama in Karnataka today witnessed the launch of women’s indefinite strike demanding liquor ban in the state.

Thousands of women from various parts of Karnataka have taken part in the strike being organised under the banner of 'Karnataka Madya Nisheda Andolana'.

The strike was launched to draw the attention of the state government to press for a complete ban on the sale of liquor across the state.

About 50 various organizations and religious pontiffs have extended their support for the strike. Food is being cooked on the bank of the river for the agitating women.

The women from Chikmagalur, Tumakuru, Raichur and Ballari districts are taking part in it.