5 saffron extremists including a Mangalurean are key suspects in Gauri Lankesh murder

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.

Bengaluru, Jun 8: Veteran Congress leader Mallikarjun Kharge on Monday filed his nomination as the party's candidate for the June 19 Rajya Sabha polls from Karnataka.

The former union minister filed his nomination in the presence of KPCC President D K Shivakumar, Leader of Opposition Siddaramaiah and other senior party leaders at the office of Legislative Assembly Secretary M K Vishalakshi, who is the returning officer for the polls.

Ahead of filing of nomination, the Congress Legislature Party meeting was held under the leadership of Siddaramaiah, after which Shivakumar issued "B-form" to Kharge.

The Congress high command on June 5 had announced Kharge as the party's candidate for the Rajya Sabha polls.

The election is scheduled on June 19 to fill four Rajya Sabha seats from Karnataka represented by Rajeev Gowda and BK Hariprasad of the Congress, Prabhakar Kore of the BJP and D Kupendra Reddy of the JD(S) that will fall vacant on June 25, with their retirement.

June 9 is the last date for filing nominations.

Congress with 68 MLAs in the assembly can win one of the four seats easily on its own, so Kharge's victory is said to be certain.

This will be the first stint in Rajya Sabha for Kharge, who has always got elected directly by the people in his political career spanning over four decades.

The leader, earlier popularly known as "solillada Saradara", (a leader without defeat), faced his first electoral loss in his political life against BJP's Umesh Jadhav in Gulbarga by a margin of 95,452 votes during the 2019 Lok Sabha polls.

A nine-time MLA and two-term Lok Sabha member, he had served as Congress floor leader in the previous Lok Sabha, and also as Union Railway and Labour Minister during the UPA government.

Kharge, who is 77-years-old, has also served as minister during several Congress governments in the state, and as KPCC President and Leader of Opposition in the Karnataka Assembly in the past.

His son, Priyank Kharge, is currently MLA representing Chittapur constituency and had served as minister during the previous Congress and coalition governments.

JD(S) patriarch and former Prime Minister HD Deve Gowda is the JD(S) candidate.

The regional party that has 34 seats in the assembly is not in a position to win a seat in Rajya Sabha on its own, and will need the support from the Congress with its surplus votes.

A minimum of 44 votes are required for candidates to win.

BJP with 117 members in the assembly (including Speaker), can ensure easy victory in two seats.

The BJP's central leadership on Monday sprang a surprise by fielding Eranna Kadadi and Ashok Gasti as its candidates for the Rajya Sabha election ignoring the recommendations of the state BJP unit.

Mangaluru, Jun 23: A charter flight carrying as many as 166 people including a child stranded in United Arab Emirates today reached Mangaluru. 

The flight was chartered by M Friends Charitable Trust, Mangaluru and My Community Foundation with the sole intention of helping the repatriation of stranded passengers such as pregnant women, elderly people and those who are in need of emergency medical care. 

The flydubia flight FZ4617 took off from Dubai at 2 p.m. and landed at Mangaluru International Airport at 7:22 p.m.

The passengers who arrived from UAE hail from different parts of coastal Karnataka and passengers themselves had borne the ticket fare for their travel.

M Friends president Haneef Haji Goltamajalu has thanked representatives of My Community Foundation and M Friends Trusty Ashraf Abbas Kunjattur, M Friends NRI leader Haneef Puttur, general secretary Rasheed Vittla for their efforts in chartering the flight.

In the last three weeks, 13 special flights with around 2150 passengers from various Gulf countries had landed at Mangaluru airport. 

Already, throat swab samples of 1814 passengers, who had arrived in Mangaluru, have been tested and 239 people with international travel history have tested positive and the samples of 1,575 passengers have tested negative so far.