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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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 6: Amidst preparation for the paid evacuation of Indians stuck in Gulf countries amidst coronavirus lockdown, the central government has announced that it would only do a medical screening of the passengers before the flight and only asymptomatic persons would be allowed to travel.

Each passenger will have to fill a self-reporting form to be presented at the health and immigration counter at their destination.

The passengers are required to state whether they are suffering from fever, cough, diabetes or any respiratory disease. This form is similar to the one filled by passengers landing in India during the early days of the COVID-19 outbreak.

As per the announcement by the government, returnees would undergo COVID-19 once they complete 14-day quarantine in a hospital or government –arranged institution on a payment basis.

However, the form asks the applicants to keep themselves isolated at home for 28 days unless they develop any symptoms such as fever and cough.

During the journey, they will have to follow the protocols such as those issued by the Health Ministry and the Civil Aviation Ministry. Applicants from the UAE are yet to receive instructions on these.

On reaching the destination, passengers will have to register on the Arogya Setu app, India’s mobile application for COVID-19 surveillance.

No physical distancing!

Air India Express (AIE) which is set to operate the first two flights to Kerala on Thursday will operate its Boeing 737-800 flights, with a seating capacity of 186 economy class seats.

With nine seats reserved for isolation, only 177 passengers would be flown, sources said.

While most of the UAE flights in the first week will be operated by the AIE, Air India will operate two of its Dreamliner aircraft with a seating capacity of 256 seats. These flights would also reserve some seats for isolation.

However, the plan has made it clear that the Indian government will not be following the rules of physical distancing to prevent the spread of coronavirus in the repatriation flights.

Several people, including the Chief Minister of Kerala Pinarayi Vijayan, expressed concern over flying passengers, who will not be tested for COVID-19, without observing physical distancing.

Bengaluru, Mar 25: Former Karnataka Chief Minister Siddaramaiah on Wednesday targetted Centre over surge in coronavirus cases in the country, alleging that the government has miserably failed in tackling the unprecedented situation and was still not managing the crisis well.
"The government has miserably failed in tackling this very serious disease. They are not properly managing the crisis," senior Congress leader Siddaramaiah told ANI.
Siddaramaiah's response comes a day after Prime Minister Narendra Modi announced a 21-day lockdown in the entire country to deal with the spread of coronavirus, saying that "social distancing" is the only option to deal with the disease, which spreads rapidly.
In a televised address to the nation, Prime Minister Modi said that it is vital to break the chain of the disease and experts have said that at least 21 days are needed for it.
The Prime Minister said the lockdown has drawn a "Lakshman Rekha" in every home and people should stay indoors for their own protection and for that of their families.
Noting that the Centre has on Tuesday allocated Rs 15,000 crore for the treatment of coronavirus patients and to strengthen health infrastructure, he said testing facilities, personal protective equipment, isolation beds, ICU beds, ventilators and other necessary materials will be ramped up.
The Prime Minister said the country will have to bear the economic cost of lockdown but saving the life of every citizen is his priority and the priority of the Central and state governments as also of local administrations.
Noting that the virus spreads like fire, he said that if care is not taken for 21 days, the country, a family can go behind by 21 years.
According to the Indian Council of Medical Research (ICMR), India has reported about 536 individuals have been confirmed positive among suspected cases and contacts of known positive cases. A total of 22,694 samples from March 24 till 8 pm.
Ten people have died so far due to the deadly virus, according to the data by Union health ministry.

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