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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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

Mangaluru, May 5: Even though India is all set to bring back Indian nationals stranded abroad through special commercial flights, no flights have been arranged for the repatriation Kannadigas stuck in Kingdom of Saudi Arabia in the first phase (May 7 to May 14). However a few flights will fly from Saudi to Kerala and Delhi.

The government is likely to introduce flights from Saudi Arabia to Karnataka (Bengaluru and Mangaluru Airports) in second or third phase.

Fill the Form

All Indian nationals in Saudi Arabia who seek repatriation are supposed to fill form in the following link: https://t.co/K5Hbmr4cFP 

Meanwhile, the Indian Embassy in Riyadh has clarified that the purpose is only to collect data and no decision has been taken yet regarding resumption of flights.

High airfare

Even though some GCC governments paid the ticket fares to bring back their citizens, the government of India has clarified that it will not pay the ticket fares of Indian nationals stranded abroad. It is predicted that tickets on repatriation flights from Saudi Arabia to India could be costlier than regular airfare.

Only asymptomatic can travel 

As per Standard Operating Protocol, medical screening of passengers would be done before taking the flight. Only asymptomatic passengers would be allowed to travel. During the journey, all these passengers would have to follow the protocols, such as the health protocols, issued by the ministry of health and the ministry of civil aviation," it said in a statement.

Mandatory quarantine

The govt has made elaborate arrangements to conduct medical test on arrival at the Airports. As per plan, based on medical check-up, passengers will be categorised as group A/B/C. Later, they will be quarantined for the mandated days

Respective district administrations have taken steps to quarantine people returning from outside India. Marriages halls, general halls and hostels are being identified for the quarantine.

Hassan, May 8: A newly married couple accidentally fell into the Hemavathi river and drowned while clicking selfies near Henneli village in the district, police said on Friday.

The deceased were identified as Kritika (23) of the same village and Artheesh (27) of Belur taluk in the district.

They got married on March 20. Both were working in Bengaluru and were in the village due to the lockdown.