‘Chowkidar chor hai’ remark: Rahul Gandhi tenders unconditional apology to Supreme Court

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, May 9: Home Minister Amit Shah today tweeted to say he is healthy and not suffering from any disease, dismissing recent rumours on social media about his health. "I want to make it clear that I am completely healthy and do not suffer from any disease," the Home Minister wrote.

The 55-year-old home minister said for the last few days, some people on social media have been spreading rumours about his health. "In fact, many have tweeted even wishing for my death," he said.

मेरे स्वास्थ्य की चिंता करने वाले सभी लोगों को मेरा संदेश। pic.twitter.com/F72Xtoqmg9

— Amit Shah (@AmitShah) May 9, 2020
Mr Shah said with the country fighting the coronavirus pandemic, that has affected nearly 40,000 people and killed more than 1,900, he did not pay attention to these rumours as he was busy performing his duties as the home minister. He said he was clarifying today because lakhs of BJP workers have expressed concern over the last two days.

The Home Minister, taking a jibe at those spreading rumours, said such speculation about his health will only make him stronger. "I request people to stop indulging in such talks and let me do my work, they should also go about their business," he added.

Amit Shah thanked well-wishers and workers of the BJP for enquiring about his health. He signed off by saying he has no hatred towards those who spread the rumours.

New Delhi, Jul 19: Amid the political firestorm in Rajasthan following Sachin Pilot's rebellion, senior Congress leader Kapil Sibal on Sunday called for amending the anti-defection law to ban all defectors from holding public office for five years and fighting the next election.

Sibal also said that the "antibodies" against the "virus of corrupt means" to topple elected governments lie in amending the Tenth Schedule of the Constitution (anti-defection law).

His attack comes in the wake of Pilot's open rebellion against the Ashok Gehlot government, which has been on shaky ground since, with at least 18 legislators backing the rebel leader.

Pilot was sacked as deputy chief minister and the state Congress chief earlier this week.

The Congress has accused the BJP of making efforts to topple the Gehlot government by indulging in horse-trading.

"Need for Vaccine: Virus of 'corrupt means' to topple elected governments has spread through a 'Wuhan like facility' in Delhi," Sibal tweeted, in an apparent swipe at the BJP.

"Its 'antibodies' lie in amending the Tenth Schedule. Ban all defectors from: Holding public office for five years, fighting the next election," he said.

Taking a swipe at Pilot over his claim that he is not joining the BJP, Sibal on Thursday had asked what happens to his "ghar wapsi" and whether Rajasthan's dissident legislators are vacationing in Haryana under the "watchful eye" of the saffron party.

In the house of 200, the Congress has 107 MLAs, including the 19 dissidents who have been issued notices of disqualification by the speaker and they have challenged them in the high court.

The Congress has maintained the claim that the Gehlot government has the support of 109 MLAs, including the two BTP MLAs.