COVID-19: India records highest-ever spike at 4,987 cases, tally reaches 90,927

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/ Jammu, Jun 29: Syed Ali Shah Geelani, the face of Kashmir's separatist politics for over three decades, has quit the Hurriyat Conference, the biggest separatist amalgam in Kashmir. The 90-year-old, who had led the separatist movement in Kashmir Valley since the 1990s, was a lifelong chairman of the Hurriyat.

He has mostly been in house arrest since 2010, when anger and violence over police firing on protesters consumed Kashmir.

In an audio message, Syed Ali Shah Geelani said he was announcing his resignation from the All Party Hurriyat Conference because of "the current circumstances" in the umbrella group.

"In view of the current state of the Hurriyat Conference, I am announcing my complete dissociation from the forum. In this context I have already sent a detailed letter to all constituents of the forum," said Geelani in an audio message released this morning.

This marks a major development for separatist politics in Jammu and Kashmir after the government ended its special status under the constitution's Article 370 in August last, split it into two union territories and enforced massive restrictions in movement besides jailing scores of leaders.

Geelani also released a two-page letter in which he accused constituents of Hurriyat of inaction after the scrapping of Article 370.

"I sent messages to you through various means so the next course of action could be decided but all my efforts were in vain. Now that the sword of accountability is hanging over your heads for the financial and other irregularities, you thought of calling the advisory committee meeting," he wrote.

The letter accused Hurriyat constituents of hatching "conspiracy and resorting to lies against him" and also teaming up with the Hurriyat chapter in Pakistan Occupied Kashmir, which had targeted him. "Instead of reprimanding them, you called a meeting in Srinagar and ratified their stand. You people have become part of the conspiracy and lies," said the letter.

"The lack of discipline and other shortcomings were ignored and you did not allow a robust accountability system to be established over the years but today, you have crossed all limits and indulged in rebellion against the leadership."

Sources say Geelani had been attacked by groups in Pakistan for what they called his failure to respond to the government's big move. Many questioned the silence of the separatist hardliner, who was prone to calls for protest shutdowns and election boycotts.

A three-time MLA from Sopore, Geelani quit electoral politics after militancy erupted in Kashmir. Recent reports have claimed that he has been unwell.

Tehran, Mar 10: Twenty-seven people have died from methanol poisoning in Iran after rumours that drinking alcohol can help cure the novel coronavirus infection, state news agency IRNA reported on Monday. The outbreak of the virus in Islamic republic is one of the deadliest outside of China, where the disease originated.

Twenty have died in the southwestern province of Khuzestan and seven in the northern region of Alborz after consuming bootleg alcohol, IRNA said.

Drinking alcohol is banned in Iran for everyone except some non-Muslim religious minorities. Local media regularly report on lethal cases of poisoning caused by bootleg liquor.

A spokesman for Jundishapur medical university in Ahvaz, the capital of Khuzestan, said 218 people had been hospitalised there after being poisoned.

The poisonings were caused by "rumours that drinking alcohol can be effective in treating coronavirus," Ali Ehsanpour said.

The deputy prosecutor of Alborz, Mohammad Aghayari, told IRNA the dead had drunk methanol after being "misled by content online, thinking they were fighting coronavirus and curing it." If ingested in large quantities, methanol can cause blindness, liver damage and death.

Iran has been scrambling to contain the spread of the COVID-19 illness which has hit all of the country's 31 provinces, killing 237 people and infecting 7,161.

According to IRNA, 16 out of 69 confirmed cases have died of coronavirus infection in Khuzestan as of Sunday.