'If honest, Modi should not fear CBI probe in Rafale Deal, Says Arvind Kejriwal

The coronavirus can stay aloft for hours in tiny droplets in stagnant air, infecting people as they inhale, mounting scientific evidence suggests.

This risk is highest in crowded indoor spaces with poor ventilation, and may help explain superspreading events reported in meatpacking plants, churches and restaurants.

It’s unclear how often the virus is spread via these tiny droplets, or aerosols, compared with larger droplets that are expelled when a sick person coughs or sneezes, or transmitted through contact with contaminated surfaces, said Linsey Marr, an aerosol expert at Virginia Tech.

Follow latest updates on the Covid-19 pandemic here

Aerosols are released even when a person without symptoms exhales, talks or sings, according to Marr and more than 200 other experts, who have outlined the evidence in an open letter to the World Health Organization.

What is clear, they said, is that people should consider minimizing time indoors with people outside their families. Schools, nursing homes and businesses should consider adding powerful new air filters and ultraviolet lights that can kill airborne viruses.

What does it mean for a virus to be airborne?

For a virus to be airborne means that it can be carried through the air in a viable form. For most pathogens, this is a yes-no scenario. HIV, too delicate to survive outside the body, is not airborne. Measles is airborne, and dangerously so: It can survive in the air for up to two hours.

For the coronavirus, the definition has been more complicated. Experts agree that the virus does not travel long distances or remain viable outdoors. But evidence suggests it can traverse the length of a room and, in one set of experimental conditions, remain viable for perhaps three hours.

How are aerosols different from droplets?

Aerosols are droplets, droplets are aerosols — they do not differ except in size. Scientists sometimes refer to droplets fewer than 5 microns in diameter as aerosols. (By comparison, a red blood cell is about 5 microns in diameter; a human hair is about 50 microns wide.)

From the start of the pandemic, the WHO and other public health organizations have focused on the virus’s ability to spread through large droplets that are expelled when a symptomatic person coughs or sneezes.

These droplets are heavy, relatively speaking, and fall quickly to the floor or onto a surface that others might touch. This is why public health agencies have recommended maintaining a distance of at least 6 feet from others, and frequent hand washing.

But some experts have said for months that infected people also are releasing aerosols when they cough and sneeze. More important, they expel aerosols even when they breathe, talk or sing, especially with some exertion.

Scientists know now that people can spread the virus even in the absence of symptoms — without coughing or sneezing — and aerosols might explain that phenomenon.

Because aerosols are smaller, they contain much less virus than droplets do. But because they are lighter, they can linger in the air for hours, especially in the absence of fresh air. In a crowded indoor space, a single infected person can release enough aerosolized virus over time to infect many people, perhaps seeding a superspreader event.

For droplets to be responsible for that kind of spread, a single person would have to be within a few feet of all the other people, or to have contaminated an object that everyone else touched. All that seems unlikely to many experts: “I have to do too many mental gymnastics to explain those other routes of transmission compared to aerosol transmission, which is much simpler,” Marr said.

Can I stop worrying about physical distancing and washing my hands?

Physical distancing is still very important. The closer you are to an infected person, the more aerosols and droplets you may be exposed to. Washing your hands often is still a good idea.

What’s new is that those two things may not be enough. “We should be placing as much emphasis on masks and ventilation as we do with hand washing,” Marr said. “As far as we can tell, this is equally important, if not more important.”

Should I begin wearing a hospital-grade mask indoors? And how long is too long to stay indoors?

Health care workers may all need to wear N95 masks, which filter out most aerosols. At the moment, they are advised to do so only when engaged in certain medical procedures that are thought to produce aerosols.

For the rest of us, cloth face masks will still greatly reduce risk, as long as most people wear them. At home, when you’re with your own family or with roommates you know to be careful, masks are still not necessary. But it is a good idea to wear them in other indoor spaces, experts said.

As for how long is safe, that is frustratingly tough to answer. A lot depends on whether the room is too crowded to allow for a safe distance from others and whether there is fresh air circulating through the room.

What does airborne transmission mean for reopening schools and colleges?

This is a matter of intense debate. Many schools are poorly ventilated and are too poorly funded to invest in new filtration systems. “There is a huge vulnerability to infection transmission via aerosols in schools,” said Don Milton, an aerosol expert at the University of Maryland.

Most children younger than 12 seem to have only mild symptoms, if any, so elementary schools may get by. “So far, we don’t have evidence that elementary schools will be a problem, but the upper grades, I think, would be more likely to be a problem,” Milton said.

College dorms and classrooms are also cause for concern.

Milton said the government should think of long-term solutions for these problems. Having public schools closed “clogs up the whole economy, and it’s a major vulnerability,” he said.

“Until we understand how this is part of our national defense, and fund it appropriately, we’re going to remain extremely vulnerable to these kinds of biological threats.”

What are some things I can do to minimize the risks?

Do as much as you can outdoors. Despite the many photos of people at beaches, even a somewhat crowded beach, especially on a breezy day, is likely to be safer than a pub or an indoor restaurant with recycled air.

But even outdoors, wear a mask if you are likely to be close to others for an extended period.

When indoors, one simple thing people can do is to “open their windows and doors whenever possible,” Marr said. You can also upgrade the filters in your home air-conditioning systems, or adjust the settings to use more outdoor air rather than recirculated air.

Public buildings and businesses may want to invest in air purifiers and ultraviolet lights that can kill the virus. Despite their reputation, elevators may not be a big risk, Milton said, compared with public bathrooms or offices with stagnant air where you may spend a long time.

If none of those things are possible, try to minimize the time you spend in an indoor space, especially without a mask. The longer you spend inside, the greater the dose of virus you might inhale.

Davos, Jan 20: India's richest 1 per cent hold more than four-times the wealth held by 953 million people who make up for the bottom 70 per cent of the country's population, while the total wealth of all Indian billionaires is more than the full-year budget, a new study said on Monday.

Releasing the study 'Time to Care' here ahead of the 50th annual meeting of the World Economic Forum (WEF), rights group Oxfam also said the world's 2,153 billionaires have more wealth than the 4.6 billion people who make up 60 per cent of the planet's population.

The report flagged that global inequality is shockingly entrenched and vast and the number of billionaires has doubled in the last decade, despite their combined wealth having declined in the last year.

"The gap between rich and poor can't be resolved without deliberate inequality-busting policies, and too few governments are committed to these," said Oxfam India CEO Amitabh Behar, who is here to represent the Oxfam confederation this year.

The issues of income and gender inequality are expected to figure prominently in discussions at the five-day summit of the WEF, starting Monday. The WEF's annual global risks Report has also warned that the downward pressure on the global economy from macroeconomic fragilities and financial inequality continued to intensify in 2019.

Concern about inequality underlies recent social unrest in almost every continent, although it may be sparked by different tipping points such as corruption, constitutional breaches, or the rise in prices for basic goods and services, as per the WEF report.

Although global inequality has declined over the past three decades, domestic income inequality has risen in many countries, particularly in advanced economies and reached historic highs in some, the Global Risks Report flagged last week.

The Oxfam report further said "sexist" economies are fuelling the inequality crisis by enabling a wealthy elite to accumulate vast fortunes at the expense of ordinary people and particularly poor women and girls.

Regarding India, Oxfam said the combined total wealth of 63 Indian billionaires is higher than the total Union Budget of India for the fiscal year 2018-19 which was at Rs 24,42,200 crore.

"Our broken economies are lining the pockets of billionaires and big business at the expense of ordinary men and women. No wonder people are starting to question whether billionaires should even exist," Behar said.

As per the report, it would take a female domestic worker 22,277 years to earn what a top CEO of a technology company makes in one year.

With earnings pegged at Rs 106 per second, a tech CEO would make more in 10 minutes than what a domestic worker would make in one year.

It further said women and girls put in 3.26 billion hours of unpaid care work each and every day -- a contribution to the Indian economy of at least Rs 19 lakh crore a year, which is 20 times the entire education budget of India in 2019 (Rs 93,000 crore).

Besides, direct public investments in the care economy of 2 per cent of GDP would potentially create 11 million new jobs and make up for the 11 million jobs lost in 2018, the report said.

Behar said the gap between rich and poor cannot be resolved without deliberate inequality-busting policies, and too few governments are committed to these.

He said women and girls are among those who benefit the least from today's economic system.

"They spend billions of hours cooking, cleaning and caring for children and the elderly. Unpaid care work is the 'hidden engine' that keeps the wheels of our economies, businesses and societies moving.

"It is driven by women who often have little time to get an education, earn a decent living or have a say in how our societies are run, and who are therefore trapped at the bottom of the economy,” Behar added.

Oxfam said governments are massively under-taxing the wealthiest individuals and corporations and failing to collect revenues that could help lift the responsibility of care from women and tackle poverty and inequality.

Besides, the governments are also underfunding vital public services and infrastructure that could help reduce women and girls' workload, the report said.

As per the global survey, the 22 richest men in the world have more wealth than all the women in Africa.

Besides, women and girls put in 12.5 billion hours of unpaid care work each and every day -- a contribution to the global economy of at least USD 10.8 trillion a year, more than three times the size of the global tech industry.

Getting the richest one per cent to pay just 0.5 per cent extra tax on their wealth over the next 10 years would equal the investment needed to create 117 million jobs in sectors such as elderly and childcare, education and health.

Governments must prioritise care as being as important as all other sectors in order to build more human economies that work for everyone, not just a fortunate few, Behar said.

Oxfam said its calculations are based on the latest data sources available, including from the Credit Suisse Research Institute's Global Wealth Databook 2019 and Forbes' 2019 billionaires list.

New Delhi, Jun 24: Union Civil Aviation Minister Hardeep Singh Puri on Tuesday said that nearly 1,25,000 Indians have returned from different countries under the Vande Bharat Mission.

He informed that 6,037 people returned to India from overseas on June 23.

"Vande Bharat continues to be a mission of hope and happiness for stranded and distressed Indians around the world. So far, nearly 125K Indians have come back on these evacuation flights and nearly 43K have flown out of India. Today (on Tuesday) 6,037 people returned from different countries," Puri said in a tweet.

As many as 2,50,087 Indian nationals stranded abroad have been repatriated since the beginning of Vande Bharat Mission last month, the Ministry of External Affairs (MEA) said last week.

The Vande Bharat Mission, which started from May 7 to evacuate Indians stranded abroad due to coronavirus pandemic, is in its third phase.
The recent phase commenced on June 11.

Under the third phase, India would have 550 flights including 191 feeder flights.