Worried over How to Cope with Coronavirus Fallout, Finance Minister of Germany's Hesse State Kills Self

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.

Apr 26: The Chinese city of Wuhan, where the global coronavirus pandemic began, now has no remaining cases in its hospitals, a health official told reporters on Sunday.

"The latest news is that by April 26, the number of new coronavirus patients in Wuhan was at zero, thanks to the joint efforts of Wuhan and medical staff from around the country," National Health Commission spokesman Mi Feng said at a briefing.

The city had reported 46,452 cases, 56% of the national total. It saw 3,869 fatalities, or 84% of China's total.

Islamabad, Jul 20: Six advisors of Pakistan Prime Minister Imran Khan posses dual citizenships and several of top 20 aides have admitted of owning movable and immovable assets worth millions of dollars abroad.

The list was published on the official website of Pakistan government's cabinet division.
All the dual nationals were working as special assistants to the prime minister (SAPM). 

These people include SAPM on Overseas Pakistanis Syed Zulfiqar Abbas Bukhari (UK), SAPM on Power Division Shahzad Qasim (US), SAPM on Petroleum Nadeem Babar (US), SAPM on Political Affairs Shahbaz Gill (US), SAPM on Parliamentary Coordination Nadeem Afzal Gondal (Canada) and SAPM on Digital Pakistan Tania Aidrus (Canadian citizenship by birth).

According to Gulf News report, the wealthiest SAPM is Power Division and Mineral Resources Assistant Shahzad Syed Qasim who has assets worth over Rs 4 billion followed by SAPM on Petroleum Nadeem Babar with assets worth Rs 2.75 billion. Meanwhile, Adviser for Overseas Pakistanis Syed Zulfiqar Abbas Bukhari's net assets is estimated over Rs 2 billion.

Giving further details of the wealthiest SAPM, the official website stated that the PM's aide on Power Division and Coordination of Marketing and Development of Mineral Resources owns assets in Pakistan, UAE and US. His three properties in UAE include two villas in Jumeirah Golf Estates and Sienna Lakes, Jumeirah Golf Estates and an apartment at Park Towers, DIFC - all worth Dh20,688,000. He has three cars in the UAE worth Dh400,000 and in the US, he has property worth US$865,000 while he has Rs 4 billion in various local and foreign bank accounts and retirement funds including $2.1 million in US.

Meanwhile, Nadeem Babbar, who is Special Assistant on Petroleum Division, owns assets worth over Rs 2.7 billion, including several properties in Pakistan and abroad and stakes in more than 30 local and foreign companies.

The Gulf News further reported that in the list Dr Moeed Yusuf's, Special Assistant to the Prime Minister on National Security Division and Strategic Policy Planning, the name was also included but was later withdrawn as it was clarified that he had the US residency and only holds the citizenship of Pakistan as per the affidavit submitted to the government. "I have not returned to the US since I took up my current responsibility, have no employment or income in the US nor do I have any millions worth properties abroad" Dr Yusuf was quoted as saying.

The latest list on PM Imran Khan's advisors possessing dual nationalities has sparked strong criticisms by the Opposition leaders.