Congress failed as Opposition, disconnected with people: Modi

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.

Washington, Jul 18: The Foreign Direct Investment (FDI) from the US to India has crossed the $40 billion mark so far this year, reflecting the growing confidence of American companies in the country, the head of an India-centric business advocacy group has said.

The American companies, during the Covid-19 pandemic, which has battered the world economy, have shown great confidence in India and its leadership, said Mukesh Aghi, president of the US-India Strategic and Partnership Forum (USISPF), which keeps a track of the major US FDIs in India.

“Year to date investment from the US, including the recent ones, is over $40 billion,” Aghi said.

In recent weeks alone, the announcement of the FDI into India has been over $20 billion, he said, referring to the announcements made by some of the top companies like Google, Facebook and Walmart.

“Investors’ confidence in India is high. India still remains a very promising market for global investors. If you look at the $20 billion… not just the US, but (investment) has also come from other geographies such as the Middle East and the Far East.

“So, India still remains a very, very bullish market for the investor community,” Aghi said in response to a question.

The USISPF has been working with New Delhi to bring in FDI into India… playing a key role in encouraging American companies planning to move their bases out of China, he said, adding that the move was going on in the last three years of the Trump administration, but gained momentum during the coronavirus pandemic.

“We feel that Prime Minister (Narendra Modi’s) intention is very high. The challenges lie on the execution side. Efforts are being made to encourage manufacturing… I've never seen it so better. The policy framework is moving in the right direction,” he said.

Early this week, Larry Kudlow, the White House Economic Advisor, told reporters that the US tech giants like Google and Facebook announcing big investments in India shows that people are losing trust in China and India is emerging as a big competitor.

At the same time, he rued that India continues to be a protectionist country.

“The question is how do you define protectionism... the administration here is saying America first and India is saying vocal for local…,” Aghi added.

Miami, Mar 12: The NBA has suspended its season "until further notice" after a Utah Jazz player tested positive Wednesday for the coronavirus, a move that came only hours after the majority of the league's owners were leaning toward playing games without fans in arenas.

Now there will be no games at all, at least for the time being. A person with knowledge of the situation said the Jazz player who tested positive was center Rudy Gobert. The person spoke to The Associated Press on condition of anonymity because neither the league nor the team confirmed the test.

"The NBA is suspending game play following the conclusion of tonight's schedule of games until further notice,'' the league said in a statement sent shortly after 9:30 p.m. EDT. "The NBA will use this hiatus to determine next steps for moving forward in regard to the coronavirus pandemic.''

The test result, the NBA said, was reported shortly before the scheduled tip-off time for the Utah at Oklahoma City game on Wednesday night was called off. Players were on the floor for warmups and tip-off was moments away when they were told to return to their locker rooms. About 30 minutes later, fans were told the game was postponed ``due to unforeseen circumstances."

Shutdown for two weeks?

Those circumstances were the league's worst-case scenario for now -- a player testing positive. A second person who spoke to AP on condition of anonymity said the league expects the shutdown to last a minimum of two weeks, but cautioned that time-frame is very fluid.

"It's a very serious time right now," Miami Heat coach Erik Spoelstra said. "I think the league moved appropriately and prudently and we'll all just have to monitor the situation and see where it goes from here."

The Jazz released a statement saying a player -- they did not identify Gobert -- tested negative earlier Wednesday for flu, strep throat and an upper respiratory infection. That player's symptoms diminished as the day went along, but the decision was made to test for COVID-19 anyway. That test came back with a preliminary positive result.

"The individual is currently in the care of health officials in Oklahoma City," the Jazz said, adding that updates would come as appropriate.