Malpe fishing boat tragedy: two missing fishermen found alive; boat recovered

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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: Continuing the relief work they started in the wake of the Corona Lockdown, ‘Team B-Human’ a local social organization is reaching out to the migrant workers who are stuck here in the region, unable to return to the homes.

Team of volunteers of the organization reached out to the migrant workers and distributed essential items including clothes and footwear of men, women, and kids.

Earlier, the organization had reached out to thousands of migrant workers and needy families and had helped them with food kits, Ramadan Kits along with medical assistance to many.

Several migrant workers recently moved back to their respective states, villages with their families, while others, unable to move back for various reasons are stuck here facing several difficulties and plights. The relief work by ‘Team B Human’ has helped several families of migrant workers in these distressing times.

Bengaluru, Apr 1: The state government has identified five districts, including Dakshina Kannada, as 'cluster zones' or 'Red zones,' to prevent the spread of Novel Coronavirus.

The other four districts include Mysuru, Uttara Kannada, Bengaluru and Chikkaballapur.

Mangaluru has been under strict lockdown, as it is close to Kasargod in Kerala, which reported many positive cases and is also one of the 'hotspots' in the National Centre for Disease Control (NCDC) list.