Mangaluru: Activist Vidya Dinker bags Lawrence Pinto Human Rights Award

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, Jul 13: The Bruhat Bengaluru Mahanagara Palike (BBMP) has initiated the process of recruiting 1,700 medical professionals, doctors, staff nurses and support staff to scale up its workforce to set up 30,000 COVID-19 care beds, an official said on Sunday.

According to the official, to establish and run 30,000 COVID care beds, 1,800 doctors and 3,600 nurses are required. A 10,100-bed facility was set up last week in the Bengaluru International Exhibition centre (BIEC) on Tumkur road.

The Health Department has calculated that one doctor per shift is needed for every 100 patients and one staff nurse for every 50 patients. Similarly, two supporting staff and three Group D employees are needed per shift for every 100 patients. Generally, a day is divided into three shifts of eight hours each.

According to the director of medical education, there are 25,000 nursing students who have completed GNM and BSc Nursing courses and are pursuing higher education.

Likewise, there are 3,231 medical, dental and Aayush interns, while MD and MS postgraduate students have been identified to be 1,613 in Bengaluru colleges.

"The department plans to actively utilise the services of interns and postgraduate students for the COVID Care Centre (CCC) operations," said the official.

Currently, there are 2,100 CCC beds operational under the civic body in Bengaluru with a pool of 503 doctors, 167 ayush doctors, 128 nursing and paramedical staff.

Earlier in May, the civic body also notified the recruitment of 380 microbiologists, technicians and data entry operators for six months. In June, the civic body again notified the recruitment of 637 doctors, nurses, technicians and group d employees to strengthen its fight against the pandemic.

Bengaluru has recently seen a spike in COVID-19 in Karnataka, accounting for 61% of all active cases in the state.

On Saturday, the city reported 1,533 new cases, taking its total tally to 16,862, of which 12,793 are active.

Karnataka recorded 2,798 more coronavirus cases and 70 more casualties on Saturday evening, raising the state's total cases to 36,216 and the death toll to 613.