Security tightened in Mangaluru for PM Modi’s visit

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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 31: Ten persons who were under home quarantine in Bengaluru and had escaped to their native places, were arrested on Monday.
A case has been registered against them at Gurmitkal Police Station, said BH Anil Kumar, Bruhat Bengaluru Mahanagar Palike (BBMP) Commissioner.

Seven new COVID-19 cases were confirmed in Karnataka between Saturday 5 pm and Sunday 2 pm.

The total number of positive cases in the state stands at 83, out of which five have been cured and three have lost their lives, according to the Karnataka Health Department.

Mangaluru, May 26: Days after the government of India approved the use of chartered flights for the repatriation of Indians stranded across the world amidst covid-19 lockdown, two NRI entrepreneurs in Saudi Arabia have offer to bear the cost of repatriation if they get formal green signal to repatriate stranded Indians from Dammam to Mangaluru International Airport before June 5.

Althaf Ullal and Basheer Sagar, the two Kannadiga Directors of Al Khobar-based Saqco, have made this offer in a letter written to Karnataka Chief Minister BS Yediyurappa and Union Civil Aviation Minister Hardeep Singh Puri.

The duo have assured that their company will bear the cost of the first chartered flight from Dammam to Mangaluru if the government paves way for its operation by June 5. 

It is learnt that many private airliners have come forward to operate chartered flight and are waiting for final clearance from the government. It will cost approximately Rs 45 lakh to hire chartered flight with 180 capacity from Dammam to Mangaluru. 

Pregnant women, medical emergency cases, senior citizens on visit visas, those who lost jobs due to lockdown among other stranded Indians will be given priority in this flight, they said.

"Our company will completely bear this cost. Passengers only need to bear the cost of institutional quarantine after reaching Mangaluru," they have clarified.