PM Modi to feature in Discovery's 'Man vs Wild' with Bear Grylls

New Delhi, Mar 11: According to the Union health ministry, there are 62 confirmed cases of coronavirus in the country.

The Delhi High Court Wednesday sought the stand of the Centre and the Delhi government on a PIL seeking proper and adequate measures to combat coronavirus.

A bench of Chief Justice D N Patel and Justice C Hari Shankar issued notice to the Ministry of Health and the Delhi government seeking their replies on the public interest litigation (PIL) filed by an advocate.

The petition, by lawyer Triveni Potekar, seeks directions to the Centre and the Delhi government to make available important and relevant information on access to and availability of medical facilities for testing and treatment for the coronavirus disease.

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.

New Delhi, Jun 3: India registered its highest single-day spike in COVID-19 cases on Wednesday with 8,909 more cases reported in the last 24 hours, taking the country's tally to 2,07,615, while the death toll rose to 5,815 according to the Union Health and Family Welfare Ministry.

The number of active COVID-19 cases stood to 1,01,497 while 1,00,303 people have been cured/discharged/migrated.

According to the Union Health and Family Welfare Ministry, out of all the states, Maharashtra has recorded the highest number of coronavirus cases with 72,300 patients followed by Tamil Nadu with 24,586 cases.