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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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, June 11: The Saudi Arabia based Expertise Contracting Company, which is repatriating its employees to India and other countries, today allocated around 90 seats of one of its chartered flights to Kannadigas stranded in Saudi Arabia. 

The Gulf Air flight took off with around 175 passengers on board from Dammam International Airport around noon local time. It is expected to land at Mangaluru International Airport at around 7 p.m. Indian time. 

In fact the company had chartered the flights only to repatriate its employees. However, due to the lack of special flights under Vande Bharati Mission, the company decided to help the other stranded Kannadigas in Saudi Arabia, who had approached Saudi Kannadigas Humanity Forum for help. 

A company official said that around 2,000 employees from various countries in the Indian subcontinent are being repatriated, of which 1,665 are Indians.  Already hundreds of them have reached India, and hundreds are still waiting for repatriation. 

“We are grateful to Expertise for allowing to travel in the flight which the company had chartered to repatriate its own employees,” said one of the passengers before boarding the flight at the airport.  

Director of Expertise, KS Shaikh said the 20-year-old Expertise group, one of the largest conglomerates in the GCC operating in petrochemical and heavy equipment sectors, has more than 10,000 employees and their family members in the Gulf, mainly in Jubail, one of the largest industrial cities.

Of these, the company has chosen over 2,000 employees for the covid-related repatriations considering various emergencies. He said 12 chartered flights have been engaged to carry out the repatriation exercise to the Indian subcontinent.

Palakkad, Jun 1: An 11-month-old boy, whose parents are placed under COVID-19 quarantine, drowned in a bucket of water in Chalissery at Palakkad district.

The toddler Muhammed Nisan was the son of Muhammad Sadiq. The parents of the child are under home quarantine after Sadiq's brother, who is living in the same home was tested positive of COVID-19.

The child was found dead in a bucket of water kept in the bathroom on Saturday around 10 pm.

Chalissery police said that ''further actions will be taken only after the test result comes out. We have filed an unnatural death case on this.''

Since the family has been quarantined, the body of the baby has been shifted to the Thrissur Medical College for COVID-19 testing.