Six feet distancing not enough to stop coronavirus transmission in light winds: Study

News Network
May 20, 2020

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.

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News Network
February 19,2020

Beijing, Feb 19: The death count from China's new coronavirus epidemic jumped to 2,000 on Wednesday after 132 more people died in Hubei province, the hard-hit epicentre of the outbreak.

In its daily update, the province's health commission also reported 1,693 new cases of people infected with the virus.

This brings the total number of cases in mainland China past 74,000.

Most of the cases are in Hubei, where the virus first emerged in December before spiralling into a nationwide epidemic.

Wednesday's jump in the death count was an increase on Tuesday's figures, although the number of new cases reported in Hubei were the lowest for a week.

A study released by Chinese officials claimed most patients have mild cases of the illness.

Outside of hardest-hit Hubei, which has been effectively locked down to try to contain the virus, the number of new cases has been slowing and China's national health authority has said this is a sign the outbreak is under control.

President Xi Jinping, in a phone call with the British prime minister, said China's measures were achieving "visible progress", according to state media Tuesday.

However, the World Health Organization has cautioned that it was too early to tell if the decline would continue.

On Tuesday the director of a hospital in the central Hubei city of Wuhan became the seventh medical worker to succumb to the COVID-19 illness.

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News Network
May 14,2020

May 14: The UN’s children agency has warned that an additional 6,000 children could die daily from preventable causes over the next six months as the COVID-19 pandemic weakens the health systems and disrupts routine services, the first time that the number of children dying before their fifth birthday could increase worldwide in decades.

As the coronavirus outbreak enters its fifth month, the UN Children’s Fund (UNICEF) requested USD 1.6 billion to support its humanitarian response for children impacted by the pandemic.

The health crisis is “quickly becoming a child rights crisis. And without urgent action, a further 6,000 under-fives could die each day,” it said.

With a dramatic increase in the costs of supplies, shipment and care, the agency appeal is up from a USD 651.6 million request made in late March – reflecting the devastating socioeconomic consequences of the disease and families’ rising needs.

"Schools are closed, parents are out of work and families are under strain," UNICEF Executive Director Henrietta Fore said on Tuesday.

 “As we reimagine what a post-COVID world would look like, these funds will help us respond to the crisis, recover from its aftermath, and protect children from its knock-on effects.”

The estimate of the 6,000 additional deaths from preventable causes over the next six months is based on an analysis by researchers from the Johns Hopkins Bloomberg School of Public Health, published on Wednesday in the Lancet Global Health Journal.

UNICEF said it was based on the worst of three scenarios analysing 118 low and middle-income countries, estimating that an additional 1.2 million deaths could occur in just the next six months, due to reductions in routine health coverage, and an increase in so-called child wasting.

Around 56,700 more maternal deaths could also occur in just six months, in addition to the 144,000 likely deaths across the same group of countries. The worst case scenario, of children dying before their fifth birthdays, would represent an increase "for the first time in decades,” Fore said.

"We must not let mothers and children become collateral damage in the fight against the virus. And we must not let decades of progress on reducing preventable child and maternal deaths, be lost,” she said.

Access to essential services, like routine immunisation, has already been compromised for hundreds of millions of children and threatens a significant increase in child mortality.

According to a UNICEF analysis, some 77 per cent of children under the age of 18 worldwide are living in one of 132 countries with COVID-19 movement restrictions.

The UN agency also spotlighted that the mental health and psychosocial impact of restricted movement, school closures and subsequent isolation are likely to intensify already high levels of stress, especially for vulnerable youth.

At the same time, they maintained that children living under restricted movement and socio-economic decline are in greater jeopardy of violence and neglect. Girls and women are at increased risk of sexual and gender-based violence.

The UNICEF pointed out that in many cases, refugee, migrant and internally displaced children are experiencing reduced access to protection and services while being increasingly exposed to xenophobia and discrimination.

“We have seen what the pandemic is doing to countries with developed health systems and we are concerned about what it would do to countries with weaker systems and fewer available resources,” Fore said.

In countries suffering from humanitarian crises, UNICEF is working to prevent transmission and mitigate the collateral impacts on children, women and vulnerable populations – with a special focus on access to health, nutrition, water and sanitation, education and protection.

To date, the UN agency said it has received USD 215 million to support its pandemic response, and additional funding will help build upon already-achieved results.

Within its response, UNICEF has reached more than 1.67 billion people with COVID-19 prevention messaging around hand washing and cough and sneeze hygiene; over 12 million with critical water, sanitation and hygiene supplies; and nearly 80 million children with distance or home-based learning.

The UN agency has also shipped to 52 countries, more than 6.6 million gloves, 1.3 million surgical masks, 428,000 N95 respirators and 34,500 COVID-19 diagnostic tests, among other items.

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News Network
June 6,2020

United Nations, Jun 6: US President Donald Trump’s response to protests against the killing of African-American George Floyd has included language “directly associated with racial segregationists” from America's past, a group of UN human rights experts have said.

There have been widespread protests across the United States as Floyd, 46, was killed by a white police officer in Minneapolis. People from diverse backgrounds have called for justice and have voiced their support to the protests.

In the wake of protests over the killing of Floyd, Trump had tweeted that “when the looting starts, the shooting starts.”

“The response of the President of the United States to the protests at different junctures has included threatening more state violence using language directly associated with racial segregationists from the nation’s past, who worked hard to deny black people fundamental human rights," a statement issued on Friday by over 60 independent experts of the Special Procedures of the United Nations Human Rights Council said.

"We are deeply concerned that the nation is on the brink of a militarised response that reenacts the injustices that have driven people to the streets to protest,” it said.

A report in The New York Times had said that the phrase "When the looting starts, the shooting starts” was used by Miami’s former police chief Walter Headley in 1967. Headley had been “long accused of using racist tactics in his force’s patrols of black neighbourhoods,” the NYT had said.

They said the recent killing of Floyd has shocked many in the world, “but it is the lived reality of black people across the United States. The uprising nationally is a protest against systemic racism that produces state-sponsored racial violence, and licenses impunity for this violence.”

They noted that following the recent spate of killings of African-Americans, many in the United States and abroad are finally acknowledging that “the problem is not a few bad apples” but instead the problem is the very way that economic, political and social life are structured in a country that prides itself in liberal democracy, and with the largest economy in the world.

Separately, 28 UN experts called on the US Government to take decisive action to address systemic racism and racial bias in the country's criminal justice system by launching independent investigations and ensuring accountability in all cases of excessive use of force by police.

“Exactly 99 years after the massacre in Tulsa, involving the killing of people of African descent and the massive loss of life, destruction of property and loss of wealth on ‘Black Wall Street’, African Americans continue to experience racial terror in state-sponsored and privately organised violence,” the experts said.

Strongly condemning the killings of Ahmaud Arbery, Breonna Taylor and George Floyd, the experts called for systemic reform and justice. “Given the track record of impunity for racial violence of this nature in the United States, Black people have good reason to fear for their lives.”

Taylor, a 25-year-old emergency medical technician was shot in her bed when police raided the wrong house; Arbery, 25, was fatally shot while jogging near his home by three white men who chased and cornered him; and Floyd was accused of using counterfeit currency in a store and died in the street while a white officer knelt on his neck and three others participated and observed.

“The origin story of policing in the United States of America starts with slave patrols and social control, where human property of enslavers was ‘protected’ with violence and impunity against people of African descent. In the US, this legacy of racial terror remains evident in modern-day policing,” the experts said.

The experts also raised concern about the police response to demonstrations in several US cities, termed by some the ‘Fed Up-rising’, that have been marked by violence, arbitrary arrest, militarisation and the detention of thousands of protesters. Reporters of colour have been targeted and detained, and some journalists have faced violence and harassment.

“Statements from the US Government inciting and threatening violence against protesters stand in stark contrast to calls for leniency and understanding which the Government had issued in the wake of largely white protests against COVID-19 restrictions on services like barbershops, salons, and spas,” the experts said.

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