Amit Shah dares Kejriwal to visit Shaheen Bagh, asserts Modi govt will not spare anti-nationals

New Delhi, Mar 27: Cabinet Secretary Rajiv Gauba has asked states to urgently strengthen the surveillance of international travellers who entered the country before the lockdown as there appeared to be a "gap" between the actual monitoring for COVID-19 and the total arrivals.

In a letter to chief secretaries of all States and Union Territories, Gauba said such a gap in monitoring of international passengers for coronavirus "may seriously jeopardise the efforts to contain the spread of COVID-19", given that many amongst the persons who have tested positive so far in India have history of international travel.

"As you are aware, we initiated screening of international incoming passengers at the airports with effect from January 18, 2020. I have been informed that up to March 23, 2020, cumulatively, Bureau Of Immigration has shared details of more than 15 lakh incoming international passengers with the States/UTs for monitoring for COVID-19.

"However, there appears to be a gap between the number of international passengers who need to be monitored by the States/UTs and the actual number of passengers being monitored," Gauba said in his letter.

The government had started monitoring of all international passengers who have arrived in India in last two months in the wake of the coronavirus outbreak.

Gauba said,"it is important that all international passengers are put under close surveillance to prevent the spread of the epidemic."

He said the Ministry of Health and Family Welfare (MoHFW) has repeatedly emphasised the importance of monitoring, and requested the states and UTs to take immediate steps in this regard.

"I would, therefore, like to request you to ensure that concerted and sustained action is taken urgently to put such passengers under surveillance immediately as per MoHFW guidelines," he said.

The cabinet secretary also urged the chief secretaries to actively involve the district authorities in this effort.The screening of international incoming passengers at airports was done from January 18 in a phased manner.

The Central and state governments have unleashed unprecedented and extraordinary measures to contain the spread of the fast-spreading coronavirus, which has already infected more than 700 people in the country and claimed at least 17 lives.

A nationwide lockdown was also announced by Prime Minister Narendra Modi on Tuesday for 21 days.

London, May 20: The current physical distancing guidelines of 6 feet may be insufficient to prevent COVID-19 transmission, according to a study which says a mild cough in low wind speeds can propel saliva droplets by as much as 18 feet.

Researchers, including those from the University of Nicosia in Cyprus, said a good baseline for studying the airborne transmission of viruses, like the one behind the COVID-19 pandemic, is a deeper understanding of how particles travel through the air when people cough.

In the study, published in the journal Physics of Fluids, they said even with a slight breeze of about four kilometres per hour (kph), saliva travels 18 feet in 5 seconds.

"The droplet cloud will affect both adults and children of different heights," said study co-author Dimitris Drikakis from the University of Nicosia.

According to the scientists, shorter adults and children could be at higher risk if they are located within the trajectory of the saliva droplets.

They said saliva is a complex fluid, which travels suspended in a bulk of surrounding air released by a cough, adding that many factors affect how saliva droplets travel in the air.

These factors, the study noted, include the size and number of droplets, how they interact with one another and the surrounding air as they disperse and evaporate, how heat and mass are transferred, and the humidity and temperature of the surrounding air.

In the study, the scientists created a computer simulation to examine the state of every saliva droplet moving through the air in front of a coughing person.

The model considered the effects of humidity, dispersion force, interactions of molecules of saliva and air, and how the droplets change from liquid to vapour and evaporate, along with a grid representing the space in front of a coughing person.

Each grid, the scientists said, holds information about variables like pressure, fluid velocity, temperature, droplet mass, and droplet position.

The study analysed the fates of nearly 1,008 simulated saliva droplets, and solved as many as 3.7 million equations.

"The purpose of the mathematical modelling and simulation is to take into account all the real coupling or interaction mechanisms that may take place between the main bulk fluid flow and the saliva droplets, and between the saliva droplets themselves," explained Talib Dbouk, another co-author of the study.

However, the researchers added that further studies are needed to determine the effect of ground surface temperature on the behaviour of saliva in air.

They also believe that indoor environments, especially ones with air conditioning, may significantly affect the particle movement through air.

This work is important since it concerns safety distance guidelines, and advances the understanding of the transmission of airborne diseases, Drikakis said.

Rome, Mar 19: Italy on Wednesday reported 475 new deaths from the novel coronavirus, the highest one-day official toll of any nation since the first case was detected in China late last year.

The total number of deaths in Italy has reached 2,978, more than half of all the cases recorded outside China, while the number of infections stood at 35,713.

The previous record high of 368 deaths was also recorded in Italy, on Sunday. The nation of 60 million has now recorded 34.2 percent of all the deaths officially attributed to COVID-19 across the world.

With the death rate still climbing despite the Mediterranean country entering a second week under an effective lockdown, officials urged Italians to have faith and to stay strong.

"They main thing is, do not give up," Italian National Institute of Health chief Silvio Brusaferro said in a nationally televised press conference.

"It will take a few days before we see the benefits" of containment measures, said Brusaferro. "We must maintain these measures to see their effect, and above all to protect the most vulnerable."

Imposed nationally on March 12, the shutdown of most Italian businesses and a ban on public gatherings are due to expire on March 25.

But school closures and other measures, such as a ban fan attendance at sporting events, are due to run on until April 3.

A top government minister hinted Wednesday that the school closure would be extended well into next month, if not longer.

The rates within Italy itself remained stable, with two-thirds of the deaths -- 1,959 in all -- reported in the northern Lombardy region around Milan, the Italian financial and fashion capital.