How a hatemonger used a schoolgirl to concoct a stabbing story to create unrest in Honnavar

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.

Mandya, Jun 28: Prime Minister Narendra Modi praised an 83-year-old farmer from Malavalli taluk in Mandya district of Karnataka for his efforts in water conservation.

While urging the people to focus on saving water, Modi, in his 'Man Ki Baat' on All India Radio quoted Kamegowda from Dasna Doddi village who single handedly dug small 16 ponds over the years in his farm land and in nearby hill while taking his animals for grazing.

"Kamegowda ji is an ordinary farmer, albeit possessing an extraordinary personality. He has achieved a personal feat that will leave anyone awestruck! Kamegowda ji, aged 80-85 takes out his animals for grazing but at the same time he has taken it upon himself to build new ponds in his area", the PM said in his Mann Ki Baat, a monthly radio address on Sunday.

To overcome problems of water scarcity in the area, Gowda started building small ponds. Thereby, he contributed a lot for water conservation, the PM said.

"... An octagenerarian like Kamegowda ji, till now, has dug 16 ponds through his hard work and the sweat of his brow. It is possible that the ponds he has constructed may not be very big but then his efforts are huge. Today, the entire area has got a new lease of life on account of these ponds," the PM said.

A little effort by us helps nature and environment quite significantly. Many of our countrymen are putting extraordinary efforts in this endeavour, the PM said. 

Kamegowda, used to take his sheep and goats to nearby hill for grazing. After finding no water to sheeps, he started digging ponds to address water scarcity. With collection of rain water, these lakes are brimming with water even during peak summer.

Mumbai, Feb 5: Maharashtra Chief Minister Uddhav Thackeray on Wednesday said there was no need to fear the Citizenship Amendment Act, but asserted his government will not allow the proposed National Register of Citizens to be implemented as it would "impact people of all religions".

Throwing out Bangladeshi and Pakistani migrants out of the country was an old demand of the Shiv Sena, the chief minister said in the third and concluding part of his interview to party mouthpiece 'Saamana'.

"I can confidentally say the Citizenship (Amendment) Act (CAA) is not meant to throw Indian citizens out of the country. But, the National Register of Citizens (NRC) is going to impact Hindus as well," the Sena president said.

India has the right to know the number of minorities from neighbouring nations who applied for Indian citizenship after being persecuted in their home countries, he said.

"When they come here, will they get homes under the 'Pradhan Mantri Awas Yojana'? What about employment and education of their children? All these issues are important and we have the right to know," hesaid in the interview to Saamana's executive editor and Sena MP Sanjay Raut.

"As chief minister, I should know where will these people be relocated in my state. Our own people don't have adequate housing. Will these people go to Delhi, Bengaluru or Kashmir, since Article 370 is now scrapped?" he wondered.

Several Kashmiri Pandit families are staying like refugees in their own country. The CAA is not to throw citizens out of the country, Thackeray said.

"However, the NRC will impact Hindus and Muslims and the state government will not allow it to be implemented," he asserted.

Under the NRC, all citizens will have to prove their citizenship. In Assam, 19 lakh people could not prove their citizenship. Of these, 14 lakh are Hindus, Thackeray claimed.

In a veiled attack on his cousin and MNS chief Raj Thackeray, who will lead a rally in support of the CAA and NRC in Mumbai on February 9, the chief minister said the NRC is not yet a reality and there is no need for a 'morcha' in support of or against it.

"If the NRC is enforced, those who are supporting it will also be affected," he said.

Under the NRC, even Hindus will have to prove their citizenship. "I will not allow the law to be enacted. Whether I am chief minister or not, I will not allow injustice to anybody," he said.

The chief minister also took a veiled dig at the Centre's decision to give the Padma Shri award to Pakistani-origin musician Adnan Sami.

"A migrant is a migrant. You can't honour him with the Padma award. Throwing out illegal migrants was the stand of (late Shiv Sena supremo) Balasaheb Thackeray," he said without naming anyone.