Ex-CEC Krishnamurthy calls for a national election fund, ban on corporate donations

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.

Patna, Jan 25: JD Women's College in Patna has issued a direction to the students to follow the prescribed dress code on the campus while stating that wearing a 'burqa' in college is prohibited.

"All students have to come to college in the prescribed dress code, every day except on Saturday. Students are prohibited from wearing 'burqa' in college", reads a notice signed by the Principal and Proctor of the college.

The college administration has also imposed a fine of Rs. 250 for violation of the norm.

New Delhi, Mar 19: The total number of reported novel coronavirus cases in India has climbed to 169, with 30 fresh cases reported from various parts of the country on Wednesday.

The total cases in India include 25 foreign nationals and the three persons who died in Delhi, Karnataka and Maharashtra.

As coronavirus cases continue to rise in India, over 5,700 people, who had come in contact with positive cases, continue to be under rigorous surveillance, the government has said.

Maharashtra has 43 cases, including 3 foreigners, while Kerala has recorded 27 cases which include two foreign nationals. A 28-year-old woman from Pune with a travel history to France and the Netherlands tested positive for Covid-19, a senior official said on Wednesday.

A 68-year-old woman has tested positive for coronavirus in Mumbai. She was in close contact with a Covid-19 patient, who was diagnosed yesterday.

In Rajasthan, three more have tested positive for Covid-19. The new cases have come from Jhunjhunu district. Their samples have been sent to SMS Medical college.

In Maharashtra, a 21-year-old man in Pimpri Chinchwad with travel history to the Philippines, Singapore and Colombo has tested positive for coronavirus. One more person in Ratnagiri has tested positive for Covid-19.

Telangana has reported seven more confirmed coronavirus cases. All the seven are Indonesian national.

Delhi has so far reported 10 positive cases which include one foreigner while Uttar Pradesh has recorded 16 cases, including one foreigner. A man from Noida tested positive on Wednesday, taking the total number to four in Noida.

Karnataka reported two fresh cases on Wednesday, taking the number of infections to 13. The number of cases in Ladakh rose to eight and Jammu and Kashmir three. Telangana has reported six cases which include two foreigners.

One more person has tested positive for coronavirus in Kashmir. The person, with foreign travel history, has been put under isolation. He had arrived in J&K on March 16.

There will be restrictions on public transport, assembly of people and some other measures, in #Srinagar from tomorrow.

Rajasthan has also reported four cases including that of two foreigners. Tamil Nadu, Andhra Pradesh, Odisha, Uttarakhand and Punjab have reported one case each.

Tamil Nadu Health Minister C Vijayabaskar has confined the state's second positive case of coronavirus in the state.

The health minister has stated that the condition of the patient is stable and is in observation.

In Haryana, there are 16 cases, which include fourteen foreigners.

According to the Union ministry's data, 14 people have been discharged so far, including the three patients from Kerala.

Three persons infected with the virus have died so far, the latest casualty being a 64-year-old man from Mumbai with a travel history to Dubai who succumbed on Tuesday.

While a 76-year-old man from Kalaburagi who returned from Saudi Arabia died last Tuesday, a 68-year-old woman in Delhi who had tested positive for coronavirus passed away on Friday night.

The government on Tuesday banned the entry of passengers from Afghanistan, Philippines and Malaysia to India with immediate effect, according to an additional travel advisory.

With coronavirus cases swelling in the country, the government has also banned the entry of passengers from the European Union countries, Turkey and the UK from March 18 till March 31.