7 Pak soldiers killed at LoC; Sharif warns against aggression

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.

Islamabad, Apr 26: Pakistan Prime Minister Imran Khan has been trumped by the country's powerful military yet again, this time over his government's inadequate steps and its poor response in curbing the coronavirus outbreak in the country, even as cases soared over 12,500.

In his address to the nation on March 22, Khan explained the reasons for not imposing a countrywide lockdown, asserting that millions would lose their jobs and affect families, who are below the poverty line, struggling to find enough food to eat. However, less than 24 hours later, Pakistan Army spokesperson Major General Babar Iftikhar announced the implementation of lockdown in the country having a population of over 200 million, contradicting the statements made by Imran Khan.

As lockdown was imposed, the military has deployed troops across Pakistan and is orchestrating the COVID-19 response through the National Core Committee, a body set up to coordinate policy between the national and provincial governments.

"The government left a big gap in its handling of the coronavirus. The army has tried to fill that gap, there was no choice," an unnamed retired general was quoted by Financial Times as saying.

The virus crisis in Pakistan has once again made things crystal clear about who is calling the shots -- the military, widely believed to bring Imran Khan to power in 2018.

The armymen have taken over the COVID-19 crisis as an opportunity to prove their competency in contrast to Imran Khan, who was mocked after urging youth to come forward and join Corona Relief Tigers Force, a volunteer body to wage "jihad" against the virus.

According to analysts, the military's seizure of the coronavirus response marks yet another policy failure for Imran Khan in the eyes of the generals, as per the Financial Times report.

The 67-year-old cricketer-turned-politician has repeatedly failed to gain international traction over the Kashmir issue and has struggled to convince the Financial Action Task Force (FATF) in getting his country removed from 'grey list' for terror funding.

In times of emergency, one has to take clear decisions and take them through. You can't dither. The whole world is advising strong lockdown. If the prime minister does not show that he is decisive, somebody else will," said Nafisa Shah, a Member of Parliament from the opposition Pakistan Peoples Party (PPP).

Even after the lockdown was imposed, Imran Khan continued to question the need for its implementation, raising eyebrows over the country's response in tackling the virus, as cases continue to rise. This comes even as such drastic measures are in place in many countries across the world, including neighbouring India.

According to The Dawn, the country has 12,657 confirmed cases of COVID-19, which includes 2,755 recoveries and 265 deaths. Punjab has the highest number of cases -- 5,326 --, followed by 4,232 in Sindh.

However, experts suggest that the actual numbers could be more given the low testing rates and inadequate supply of testing kits.

Doctors and nurses across the country have staged protests over the lack of personal protective equipment, as increasing numbers of health workers contract COVID-19.

"Because of the lack of resources, there is chaos among the doctors and healthcare workers. They know people are dying, they know the severity of the illness and they have to work without PPE," Shoaib Hasan Tarar, a doctor working in Rawalpindi, was quoted as saying.

As the coronavirus crisis continues to ravage Pakistan, the country's overwhelming health infrastructure has put a toll on its already floundering economy. The IMF said that the GDP will shrink 1.5 per cent in 2020. The cash-strapped nation is set to be the first major emerging economy to apply to a G-20 initiative to request debt repayment relief, according to Financial Times.

In early March, Pakistan saw a surge in coronavirus cases, when infected pilgrims and workers crossed the border from Qom, a religious city in Iran, which is a hotspot.

Pakistan's limited resources were exposed when quarantined pilgrims agitated against unhealthy conditions at Taftan camp on Pakistan-Iran border, where five people were living in a tent with no access to toilets.

While the lockdown is in place, authorities have been confronted by hardline clerics who have defied social distancing terms and downplayed the threat of the virus. During Friday prayers every week, worshippers violate the restrictions by gathering at various mosques.

Last week, Islamabad inked an agreement allowing mosques to stay open for Ramzan. It stipulated that people should follow 20 rules, including maintaining a six feet distance from each other.

"There is little consistency in terms of how the lockdown is being approached. Coronavirus has shown the disconnect between the national government, regional governments and the military. Imran Khan has been left behind as the cheerleader for keeping Pakistan's morale high. I think people are starting to ask, 'How long is he going to last?'", said Sajjan Gohel, South Asia expert and guest teacher at the London School of Economics.

Jun 2: Pakistan's COVID-19 cases reached 76,398 on Tuesday after 3,938 new infections were reported across the country, while the death toll due to the coronavirus has gone up to 1,621, according to the health ministry.

The Ministry of National Health Services said that 78 COVID-19 deaths were recorded in the last 24 hours, taking the total number of fatalities in Pakistan to 1,621.

A total of 27, 110 people have recovered, it said.

Sindh has 29,647 patients, Punjab 27,850, Khyber-Pakhtunkhwa 10,485, Balochistan 4,514, Islamabad 2,893, Gilgit-Baltistan 738 and Pakistan-occupied Kashmir 271, it added.

The authorities have conducted 577,974 tests, including 16,548 in the last 24 hours.

The jump in the number of cases comes a day after Prime Minister Imran Khan said that people should learn to live with COVID-19 until a vaccine is developed.

Khan addressed the media after chairing the meeting of National Coordination Committee, the highest body to tackle the pandemic.

"Coronavirus will not go away until the vaccine is discovered. We need to learn to live with it and we can live with it if we follow precautions," he said.

He said the one million volunteers of the government's coronavirus force will raise awareness of the need to follow guidelines.

The government also said that all sectors will be opened slowly after deciding the negative list of businesses which will not be allowed.