Tharoor urges HC to stop Arnab from misreporting on Pushkar

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.

Jerusalem, Jul 23: Merging Israel's technological expertise with India's mass production capabilities, experts from the two countries have joined hands to develop rapid testing for Covid-19 in under 30 seconds.

Israel will soon send a high-level research delegation to India to conduct a series of "final stages of testing" as part of the joint effort to develop the rapid testing kits for Covid-19 .

A high ranking team from the Directorate of Defence Research and Development (DDR&D), in the Ministry of Defense, which has been working with India's DRDO to develop rapid testing for Covid-19 in under 30 seconds, is to leave from Tel Aviv to New Delhi on a special flight in a few days, Israel's Ministry of Defence said in a statement on Thursday.

Israel's Ministry of Foreign Affairs (MFA) and Ministry of Health are also involved in this unprecedented cooperation between the two countries which aims at "merging Israeli technology with Indian development and production capabilities to allow a swift resumption of normal life alongside the virus".

The DDR&D team will conduct a series of "final stages of testing" to determine the effectiveness of a number of rapid diagnostic solutions with their Indian counterparts.

Since the start of the pandemic, the DDR&D has tested dozens of diagnostic technologies. Some of them have matured and passed initial trials in Israel, however in order to complete testing and prove their effectiveness, these must be tested on a wide range of patients, IMoD said.

The four tech systems that will be tested are - voice test, breathalyzer test based on terra-hertz waves, isothermal test, and polyamino acids test.

"What they all have in common is the ability to detect the presence of the virus in the body quickly- usually within minutes. Developing diagnostic capabilities is a goal for the State of Israel and of many additional countries around the world. It is the most effective way to cut off 'chains of infection', prevent prolonged quarantine and enable the reopening of the global economy," the statement said.

"We hope that the research and development led by the DDR&D together with our excellent industries and academic institutions, will lead to a breakthrough that will change the way we diagnose and fight the virus, while giving the boost necessary to 'restart' our economy," Defense Minister Benny Gantz said.

Foreign Minister Gabi Ashkenazi noted that this cooperation provides a unique opportunity for scientific and technological cooperation that can assist Israel, India and the world in coping both with the pandemic and with the economic crisis that came with it.

The cooperation between Israel and India will enable the delegation and its Indian counterparts, to collect tens of thousands of samples in just ten days, and analyze them using computer systems based on artificial intelligence. This massive sampling will shorten processes and advance the approval of effective technology. All tests will be validated using PCR tests.

"The cooperation between India and Israel on Covid-19 is a good example of harnessing the scientific and technological strengths that the two countries have for larger, common good. It will also further deepen our strategic ties,” India's Ambassador Sanjeev Singla told PTI.

The flight will be carrying some breakthrough emerging Israeli technologies for combatting Covid-19, which have been donated by the Israeli foreign ministry and the private sector, in order to bolster India’s response to the virus outbreak.

The plane will also deliver mechanical ventilators which were given special permission by Israel for export to India.

Prime Minister Narendra Modi and his Israeli counterpart Benjamin Netanyahu have held three telephonic conversations since the outbreak of the pandemic and promised mutual assistance in dealing with the virus, committing to joint technological and scientific research between the countries.

The Israeli media widely reported that Modi lifted a ban on the export of Hydroxychloroquine at Netanyahu's request.

"The past few years have cemented the strategic relations between India and Israel and have included two historical visits of the Prime Ministers in Israel and in India," a press statement from the ministry of defence said.

"India seeks to integrate advanced technologies in its hospitals as they prepare to treat massive waves of Covid-19 patients on an Indian scale. The Israeli companies chosen by the MFA, MOD and Israel Defence Forces to be sent to India are potentially given unique access to one of the largest economies in the world to provide monitoring and treatment technologies while significantly reducing contact between the patients and the medical staff," it said.

"By opening the door to India’s market with its development and production capabilities, these Israeli technologies can be mass produced at a lower cost and could in future be jointly exported to third countries," it said.

"The COVID-19 pandemic is a global challenge, so it is only right that the solution be a global scientific cooperation between countries. India and Israel’s military R&D cooperation is well known for its success. I have no doubt the same will be seen in the private sector joined by brilliant scientific minds from both countries to introduce a breakthrough in swift and simple testing procedures,” said Prof. Nati Keller, an infectious diseases specialist from Sheba Medical Center, who is leading the medical side of the delegation.

New Delhi, Jun 29: Delhi Chief Minister Arvind Kejriwal on Monday paid tribute to the senior doctor of city government-run LNJP Hospital who died battling COVID-19, saying the society has "lost a very valuable fighter".

The 52-year-old doctor served in the front line of the war against the pandemic at the government facility, and died of novel coronavirus infection in an ICU of a private hospital on Sunday.

"Dr Aseem Gupta, a senior doctor of LNJP Hospital succumbed to Covid yday. He was known for going out of his way to serve his patients. We have lost a very valuable fighter. Delhi salutes his spirit and sacrifice...," Kejriwal tweeted.

The chief minister also said in his tweet that he has spoken to Dr Gupta''s wife and "offered my condolences and support".

LNJP Hospital is a dedicated COVID-19 facility under the Delhi government. It recently completed 100 days of being declared a coronavirus facility.

"LNJP Hospital has displayed great fortitude in the face of acute challenges. It''s recovery rate is going up, death rate is reducing, ICU capacity is being ramped up - the hospital is saving so many lives," the chief minister said.

A condolence meeting to pay respect to Dr Gupta has been scheduled at 1 pm in the office of the Medical Director of the hospital, a senior official said.

The doctor, a consultant anaesthesiologist died at the Max hospital, Saket in south Delhi, a private dedicated COVID-19 facility.

"He was a front line anaesthesia specialist who contracted COVID-19 infection while on duty. He tested positive on June 6, when he had mild symptoms and was shifted to a quarantine facility. His symptoms aggravated on June 7 and he was admitted in the Intensive Care Unit of the LNJP Hospital," the LNJP Hospital said in a statement on Sunday.

He was shifted to Max Hospital, Saket on June 8 on his request, it said.

The doctor was battling the disease for the last two weeks at Max Hospital, where he succumbed to the illness on Sunday, the statement said.

He was Specialist, Grade I, in the Department of Anaesthesia at the LNJP Hospital, the statement said.

Several hundreds of healthcare workers have been infected with COVID-19 till date in Delhi.