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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Bengaluru, Mar 15: The civic body in Bengaluru has said that gathering at marriage functions should not exceed 100 people in order to curb the spread of coronavirus.

A circular issued by Bruhat Bengaluru Mahanagara Palike (BBMP) dated March 15 said, "All marriage functions pre booked in marriage halls, hotels, Party places, etc. prior to the issue of circular dated March 13, shall be allowed to be conducted subject to the condition that the gathering in the function not exceeding 100 persons."

"The above relaxation is an exception in consideration of the difficulties in rescheduling and cancelling the Marriage event immediately," the circular said.

It said, "The Owners/Management of such locations where Marriages are to be solemnized due to pre booking shall maintain high standards of sanitation and hygiene by periodically cleaning by 10 per cent Sodium Hydrochlorite Solution or any other effective disinfectant the surfaces, floors and exposed areas likely to be touched by the attendants."

"Any person attending the function having any such symptoms like Cough, Cold, and Fever etc. shall be requested for immediately leaving the Programmes," it said.

The civic body further said in the circular, "No fresh bookings of any place for Marriage programme are permitted till further orders. Any bookings on future dates by any organizer, event manager, owner of such property or any other person will be at his own risk and action will be taken against the property or any other person for any kind of bookings before an Order allowing such bookings is issued by a Competent Authority."

"The restrictions imposed are in the absolute interest of Public Health for preventing the Community Spread and outbreak of the disease at mass scale. All other restrictions imposed by order dated March 13 shall stand the same," the Circular added.

Mangaluru, Jan 24: The Srushti Kala Vidyalaya will be conferring it's 'Srushti Kalabhushan Award' to ace Yakshagana Bhagvatha Patla Sathish Shetty.

The award ceremony will be held at RV Dental College and Hospital in JP Nagar, Bengaluru on February 2, as part of the decennial celebrations of the Vidyalaya.

Chayapathi Kanchibail, founder of the Vidyalaya, said, "The award is being given to Shetty for his services to promote the art of Yakshagana and for his welfare work through the Yakshadhruva Patla Foundation."