GDP growth slowing to 4-year low of 6.5% in 2017-18

New Delhi, May 18: With the highest-ever spike of 5,242 new cases in last 24 hours, the total number of positive COVID-19 cases in India reached 96,169 on Monday, according to the Ministry of Health and Family Welfare.

With 157 deaths reported in the last 24 hours, the death toll has risen to 3,029, as per the latest update by the ministry.

Out of the total number of cases, 36,824 have been cured/discharged/migrated.

This comes a day after the nationwide lockdown, imposed as a precautionary measure to contain the spread of COVID-19, was extended till May 31.

Maharashtra remains the worst-affected state due to the virus with 33,053 cases, including 1,198 deaths. It is followed by Gujarat (11,379), Tamil Nadu (11,224) and Delhi (10,054).

Jammu, Jan 25: People in Jammu and Kashmir expressed happiness over the restoration of mobile data services and internet access through fixed-line across the Union Territory on Saturday.

Speaking to ANI Jitendra Sharma, a resident of Jammu said, "The government has taken a good decision. People had been facing hardship for a long period and I think it will improve further."

"It is a big relief to people. People can finish their pending work. I hope that 4G services will also be resumed soon," said a resident of Kashmir.

The internet speed is restricted to 2G only.

"Access shall be limited only to whitelisted sites and not to any social media applications allowing peer to peer communication and virtual private network applications. Directions shall be effective from January 25 and will remain in force till January 31," the statement by the government read.

Earlier on January 15, 2G services were reinstated in Jammu, Samba, Kathua, and Udhampur for white-listed sites.

The Central government had suspended the internet in the region following the abrogation of Article 370 of the Constitution on August 5 last year, which conferred special status to the erstwhile state of Jammu and Kashmir, and its bifurcation into two Union Territories -- Ladakh, and Jammu and Kashmir.

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.