BJP leader arrested after 200 cows starve to death at his gaushala in Durg

New Delhi, April 4: With 355 new cases reported in the last 12 hours, India's tally of coronavirus positive cases rose to 2,902, said the ministry of Health and Family Welfare on Saturday.

Out of 2,902 cases, 2,650 are active cases and 184 have been cured or discharged or have migrated.

The total number of deaths reported due to the disease rose to 68 on Saturday.

According to the Ministry of Health and Family Welfare, Maharashtra is the worst-hit state with 423 cases. Tamil Nadu is the next most affected state with 411 cases.

The number of COVID-19 cases in Delhi also rose to 386.

The Tablighi Jamaat event in Delhi has emerged as a hotspot for COVID-19 after several positive cases from across India were linked to the gathering including deaths in Maharashtra, Karnataka, and Telangana.

An FIR was earlier registered against Tablighi Jamaat head Maulana Saad and others under the Epidemic Disease Act 1897, in the national capital.

New Delhi, May 12: Stranded for over 50 days due to the lockdown and suspension of passenger train services, many people in the national capital will finally be able to reach their destinations in different parts of the country after the railways resumed services on Tuesday.

Three special AC trains will leave the New Delhi railway station for Dibrugarh, Bengaluru and Bilaspur.

The train to Dibrugarh in Assam will leave at 4.45 p.m, while the one leaving for Bilaspur in Chhattisgarh and Bengaluru in Karnataka will leave the New Delhi station at 5.30 p.m and 9.15 p.m respectively.

Entry to the station has been facilitated from the Paharganj side for all confirmed ticket holders. No entry for passengers holding such tickets will be permitted from the Ajmeri Gate side, the railways said.

Railway authorities have put barricades outside the station premises and only those with confirmed tickets are being allowed to enter.

All passengers are undergoing thermal screening before entering the station premises. For this purpose, they have also been asked to reach the station 90 minutes prior to the departure of the train.

A senior Railway Police Force officer said every passenger is being subjected to thermal screening. Hand sanitiser machines have also been placed at the entrance and the passengers are being advised to sanitise their hands before entering the station premises.

Syed Yasir, a private retail sector executive, said due to the resumption of services he will now be able to go to Nagpur to be with his family on Eid. 

Surendra, an engineer with a PSU, was on an assignment in Agra when the lockdown was announced. After the Railways decided to resume passenger train services, he came to Delhi in a private vehicle to board the train to Bengaluru.

"I was on an assignment in Agra where I was stuck. I have come from Agra in a private vehicle and now going to board the train to Bengaluru," Surendra, who identified himself with his first name, said.

Five more trains bound for Delhi will leave from Patna, Bengaluru, Howrah, Mumbai and Ahmedabad, the railways said.

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.