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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of the American Medical Association, noted that the the current guidelines issued by the WHO and CDC are based on outdated models from the 1930s of how gas clouds from a cough, sneeze, or exhalation spread.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: As many as 178 passengers arrived in the coastal city from Dubai as the second flight under the Vande Bharat Mission landed at the Mangaluru International Airport (MIA) at 7.55am on Monday.

Among 178 passengers, there were 99 male, 67 female, 11 children and one infant.

Dakshina Kannada deputy commissioner Sindhu B Rupesh said that all the necessary arrangements had been made to ensure that the passengers were not inconvenienced in any way. 

“All of them have been provided with health kits, sufficient food, sim cards, etc. We have also set up facilities at the airport where they can exchange foreign currency. The emigration process was conducted only after each passenger was subjected to screening by health department personnel at the airport. We will have their throat swabs tested for Covid-19 on Tuesday,” Sindhu said.

Personnel attired in personal protective equipment gear shifted the passengers’ luggage, while buses had been arranged for transporting them to quarantine facilities, Sindhu added.

Probationary IAS officer Rahul Shinde, additional deputy commissioner MJ Roopa, district health officer Dr Ramachandra Bairy and MIA director VV Rao were among those who received the returning Indians along with the DC at the airport.

Public, including friends and relatives of the passengers, were barred entry to the airport.

Rooms in as many as 10 hotels have been reserved to quarantine passengers flying in to Mangaluru from the Gulf. The rooms are priced between Rs 1,000 and Rs 5,400. Meanwhile, those unable to afford rent will be accommodated at government hostels.

Mangaluru, May 18: The second repatriation flight to the coastal Karnataka from Dubai landed at Mangaluru International Airport at 7.45 pm. today.Mangaluru: As many as 178 passengers arrived in the coastal city from Dubai as the second flight under the Vande Bharat Mission landed at the Mangaluru International Airport (MIA) at 7.55am on Monday.

Dakshina Kannada deputy commissioner Sindhu B Rupesh said that all the necessary arrangements had been made to ensure that the passengers were not inconvenienced in any way.

“All of them have been provided with health kits, sufficient food, sim cards, etc. We have also set up facilities at the airport where they can exchange foreign currency. The emigration process was conducted only after each passenger was subjected to screening by health department personnel at the airport. We will have their throat swabs tested for Covid-19 on Tuesday,” Sindhu said.

Personnel attired in personal protective equipment gear shifted the passengers’ luggage, while buses had been arranged for transporting them to quarantine facilities, Sindhu added.

Probationary IAS officer Rahul Shinde, additional deputy commissioner MJ Roopa, district health officer Dr Ramachandra Bairy and MIA director VV Rao were among those who received the returning Indians along with the DC at the airport.

Public, including friends and relatives of the passengers, were barred entry to the airport.

Rooms in as many as 10 hotels have been reserved to quarantine passengers flying in to Mangaluru from the Gulf. The rooms are priced between Rs 1,000 and Rs 5,400. Meanwhile, those unable to afford rent will be accommodated at government hostels.

Bengaluru, Jul 9: Karnataka Chief Minister B S Yediyurappa on Thursday said the Covid-19 situation was “getting out of control a little” in some parts of the state, but assured citizens that authorities were taking necessary steps. 

“In some districts, it’s getting out of control a little. But the district administration and police are working day and night,” Yediyurappa said before the Cabinet meeting where the Covid-19 situation will be discussed. 

Speculation is rife that the government might consider stricter measures to curb the movement of people to try arresting the rising number of Covid-19 cases. 

Later in the day, Yediyurappa is slated to inspect the Bengaluru International Exhibition Centre, which has been converted into a Covid Care Centre with 10,000 beds. The chief minister said he had ordered “immediate” arrangement of more ambulances for Bengaluru, where cases are rapidly shooting up. 

“A team from the Centre had come. They’ve made some observations and they also appreciated us for some of the things we’ve done,” he added. 

On Friday, Yediyurappa has convened a meeting of all Bengaluru ministers, legislators, MPs and councillors to discuss the Covid-19 pandemic in the city.