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Washington, Jun 11: Observing that historically India has been a tolerant, respectful country for all religions, a top Trump administration official has said the US is "very concerned" about what is happening in India over religious freedom.

The comments by Samuel Brownback, Ambassador-At-Large for International Religious Freedom, came hours after the release of the "2019 International Religious Freedom Report" on Wednesday.

Mandated by the US Congress, the report documenting major instances of violation of religious freedom across the world was released by Secretary of State Mike Pompeo at the State Department.

India has previously rejected the US religious freedom report, saying it sees no locus standi for a foreign government to pronounce on the state of its citizens' constitutionally protected rights.

"We do remain very concerned about what's taking place in India. It's historically just been a very tolerant, respectful country of religions, of all religions," Mr Brownback said during a phone call with foreign journalists on Wednesday.

The trend lines have been troubling in India because it is such a religious subcontinent and seeing a lot more communal violence, Mr Brownback said. "We're seeing a lot more difficulty. I think really they need to have a - I would hope they would have an - interfaith dialogue starting to get developed at a very high level in India, and then also deal with the specific issues that we identified as well," he said.

"It really needs a lot more effort on this topic in India, and my concern is, too, that if those efforts are not put forward, you're going to see a growth in violence and increased difficulty within the society writ large," said the top American diplomat.

Responding to a question, Mr Brownback said he hoped minority faiths are not blamed for the COVID-19 spread and that they would have access to healthcare amid the crisis.

Prime Minister Narendra Modi has criticised any form of discrimination, saying the COVID-19 pandemic affects everyone equally. "COVID-19 does not see race, religion, colour, caste, creed, language or border before striking. Our response and conduct thereafter should attach primacy to unity and brotherhood," PM Modi said in a post on LinkedIn in February.

The government, while previously rejecting the US religious freedom report, had said: "India is proud of its secular credentials, its status as the largest democracy and a pluralistic society with a longstanding commitment to tolerance and inclusion".

"The Indian Constitution guarantees fundamental rights to all its citizens, including its minority communities… We see no locus standi for a foreign entity/government to pronounce on the state of our citizens' constitutionally protected rights," the Foreign Ministry said in June last year.

According to the Home Ministry, 7,484 incidents of communal violence took place between 2008 and 2017, in which more than 1,100 people were killed.

Dubai, Jan 10: Iran denied on Thursday that a Ukrainian airliner that crashed near Tehran had been hit by a missile, Iranian government spokesman Ali Rabiei said in a statement, according to state TV.

"All these reports are a psychological warfare against Iran. All those countries whose citizens were aboard the plane can send representatives and we urge Boeing to send its representative to join the process of investigating the black box".

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.

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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.