Alwar lynching: Cops give clean chit to 6 miscreants named by victim Pehlu Khan

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.

Jammu, Jun 3: A mob on Tuesday disrupted the last rites of a coronavirus victim in Jammu and Kashmir and forced his family members to flee with the half-burnt body, prompting intervention by the administration which later ensured the cremation at another place as per protocol.

A 72-year-old man, hailing from Doda district, became the fourth victim of the novel coronavirus to die in Jammu region. He breathed his last at the Government Medical College (GMC) hospital on Monday.

"We had set out for the funeral along with a revenue official and a medical team, and had lit the pyre at a cremation ground in Domana area when a large group of local residents appeared at the scene and disrupted the last rites," son of the deceased said.

Only close relatives of the deceased, including his wife and two sons, were present during the cremation. They had to flee with the half-burnt body in an ambulance to save their skin from the mob which pelted stones and attacked them with sticks.

"We had sought permission from the government to take the body to our home district for the last rites, but we were told that all necessary arrangements were in place, and that we would not face any trouble during the cremation," the victim's son said.

He also alleged that the security officials present at the scene were of no help.

Two policemen who were present there failed to act against the unruly crowd, while the accompanying revenue official went missing, he said.

"The ambulance driver and other staff from the hospital helped us a lot and managed to take us back to the GMC hospital with the body the government should have come out with a better plan to conduct the last rites of coronavirus victims, taking into consideration the past experience and problems encountered during the funeral of such victims," the victim's son said.

Later, the body was taken to a cremation ground at Bhagwati Nagar area of the city, where it was consigned to flames in the afternoon in presence of senior civil officials, including additional deputy commissioner and sub-divisional magistrate under tight security.

"My uncle was admitted in the hospital last week and died on Monday afternoon. He was suffering from various ailments, especially lungs and heart diseases. Before shifting him to GMC hospital Jammu, he underwent a coronavirus test in Doda which came negative," nephew of the deceased said.

However, he said, the victim's second test after his admission in the GMC hospital came positive on Sunday.

New Delhi, Jan 7: The Delhi Police has filed an FIR against JNUSU president Aishe Ghosh and 19 others for allegedly attacking security guards and vandalising the server room of the Jawaharlal Nehru University (JNU) on January 4.

The police registered the FIR on January 5.

In the complaint filed by the JNU administration, the University alleged that the accused were involved in physical violence and pushed the women guards, verbally abused them and threatened them of dire consequences if they opened the lock of university's communication and information (CIS) office.

"They illegally trespassed the University property with the criminal intention to damage the public property. They damaged servers and made it dysfunctional. They also damaged fiber optic power supplies and broke the biometric systems inside the room," the University officials alleged.

This incident allegedly occurred a day before Aishe Ghosh, other JNU students and teachers were attacked by a masked mob inside the campus.