Pakistan rejects U.S. report on religious freedom

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.

Tehran, Jun 29: Iran has issued an arrest warrant and asked Interpol for help in detaining President Donald Trump and dozens of others it believes carried out the drone strike that killed a top Iranian general in Baghdad, a local prosecutor reportedly said Monday.

While Trump faces no danger of arrest, the charges underscore the heightened tensions between Iran and the United States since Trump unilaterally withdrew America from Tehran’s nuclear deal with world powers.

Tehran prosecutor Ali Alqasimehr said Trump and more than 30 others whom Iran accuses of involvement in the Jan. 3 strike that killed Gen. Qassem Soleimani in Baghdad face “murder and terrorism charges,” the semiofficial ISNA news agency reported.

Alqasimehr did not identify anyone else sought other than Trump, but stressed that Iran would continue to pursue his prosecution even after his presidency ends.

Interpol, based in Lyon, France, did not immediately respond to a request for comment.

Alqasimehr also was quoted as saying that Iran requested a “red notice” be put out for Trump and the others, which represents the highest level arrest request issued by Interpol. Local authorities end up making the arrests on behalf of the country that request it. The notices cannot force countries to arrest or extradite suspects, but can put government leaders on the spot and limit suspects’ travel.

After receiving a request, Interpol meets by committee and discusses whether or not to share the information with its member states. Interpol has no requirement for making any of the notices public, though some do get published on its website.

It is unlikely Interpol would grant Iran’s request as its guideline for notices forbids it from “undertaking any intervention or activities of a political” nature.

The U.S. killed Soleimani, who oversaw the Revolutionary Guard’s expeditionary Quds Force, and others in the January strike near Baghdad International Airport. It came after months of incidents raising tensions between the two countries and ultimately saw Iran retaliate with a ballistic missile strike targeting American troops in Iraq.

A patient in hospital with Covid-19 has given birth to a healthy baby boy in Dubai.

The 25-year-old Indian was admitted to Al Zahra Hospital after testing positive on May 2.

Although the baby was not due to arrive until May 19, the woman went into labour three days later and delivered a healthy boy weighing 3.8kg.

The parents are yet to name the child, who has also been tested for the virus.

“When we first received the Covid-19 positive diagnosis, we were afraid for the health of both my wife and the baby,” said the boy’s father, who did not want to give his name.

“Thankfully with the help of the doctors and nurses at Al Zahra Hospital, my son was born with no complications and my wife remains in stable condition.

“We couldn’t be more grateful.”

Despite arriving two weeks early, both mother and child are doing well but will only be allowed to leave the hospital to return to their home in Dubai after they return three negative tests on the trot.

“The contractions started very suddenly and it all happened very quickly,” said Al Zahra Hospital nursing director Maysoon Yousef.

“The delivery took about 10 to 15 minutes which is something we do not see very often.

“There were no complications and both the mother and baby are in good condition.”

Strict measures are in place to ensure hygiene for those inside the hospital, as well as visitors.

The new mum and her son are in the same room as the baby needs to be nursed.

According to the Centres for Disease Control and Prevention, a US national public health institute, there is no evidence that suggests the virus can be transmitted through breastfeeding.

New mothers infected with the virus should wear a mask, wash their hands before and after touching the baby.

“We operate by the latest Covid-19 international and local guidelines when it comes to the management of our maternity patients and otherwise,” said Dr Ghassan Lutfi, head of obstetrics and gynaecology at the hospital.

“We take strict measures to guarantee that there is no risk of cross contamination and that all our patients are in safe hands.”