Thumbay Moideen receivesGlobal Leader' honor at NDTV Gulf Indian Excellence Awards 2016

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, Jan 20: A teenage girl drowned after a boat in which she was traveling in capsized in the river Netravati at Uliya Hoige, Ullal, police said on Monday.

Meanwhile, four other girls who were also traveling on the same boat were rescued by the locals, the police added. The mishap happened on Sunday.

The deceased has been identified as 18-year-old Renita, a resident of Miyapadavu.

Mangaluru, Jul 9: The coastal district of Dakshina Kannada today recorded death of two coronavirus patients.

Meanwhile, the district today also recorded 167 new covid cases taking the total number of cases to 1701.

Yesterday, the district had recorded 183 cases. Today more cases were reported from Bantwal and Ullal regions. 

According to sources, a 48-year-old man from Boloor, who was under treatment for covid-19 at designated covid hospital passed away today. 

A 62-year-old covid patient, who had SARI symptoms, breathed his last at a private hospital.

With this, the total number of deaths of covid-19 patients in the district reached 30 including two deaths caused by other reasons.

Of the 167 who tested positive on Thursday, 110 are males and 57 females including seven children.

Three have returned from Qatar and Dubai, one from Bengaluru, 42 are diagnosed with influenza-like illness (ILI), six are diagnosed with severe acute respiratory illness (SARI) and 64 are primary contacts of earlier patients. Contact tracing process of 38 patients is on, and 13 pre-surgery samples.