PM Modi strongly disapproves vandalism of statues

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.

Ahmedabad, Jan 12: Union Home Minister Amit Shah on Saturday unveiled over 5.5 lakh postcards written by Ahmedabad residents to Prime Minister Narendra Modi, thanking him for the Citizenship (Amendment) Act.

The postcards were stacked on the dais as Shah addressed a gathering of BJP workers who formed letters `C A A’ in front of him.

The state BJP claimed that the party’s “largest awareness campaign” in support of the CAA had found a place in Limca Book of Records and World Record of India.

“It is not just words but a letter of thanks written from the heart. Our public outreach programme is a reply to the lies being spread against the CAA,” Shah said addressing BJP workers from his former Assembly constituency Naranpura.

The BJP had promised to enact the CAA in its manifesto, he said, asking why the Congress did not oppose it then.

Targeting Rajasthan Chief Minister Ashok Gehlot, Shah said, “Congress has a government in Rajasthan. The Congress party in that state had promised that Hindus and Sikhs from Pakistan would be given citizenship.

“Why do you oppose it when we fulfill the promise made by you?” the Union home minister asked.

“In 2006 and 2009, Ashok Gehlot wrote a letter for the same. We covered Hindus, Sikhs, Parsis, Christians, all of them under the Act, you had only mentioned Hindus and Sikhs,” Shah claimed.

Saying that Prime Minister Narendra Modi, by bringing in the CAA, granted “human rights to lakhs of people”, he asked why opposition was against it.

He challenged “Rahul Baba” (Congress leader Rahul Gandhi), Mamata Banerjee and Arvind Kejriwal to show if any provision of the CAA took away the citizenship of Indian Muslims.

“There is no such provision. Lakhs and crores of people have come to India from Pakistan, Bangladesh to save their religion, their self-respect, to save themselves. Where else will they go?” he asked.

“From the first prime minister of the country Jawaharlal Nehru to the first home minister, first president of the country, and Mahatma Gandhi himself had said that whoever comes to India from Pakistan will be granted citizenship. Hindus, Sikhs, Buddhists and Jains coming from Pakistan have nowhere else to go,” he said.

Panaji, Feb 10: Archbishop of Goa and Daman, Rev Filipe Neri Ferrao, has urged the central government to "immediately and unconditionally revoke the Citizenship Amendment Act" and stop quashing the "right to dissent".

He also appealed to the government not to implement the proposed countrywide National Register of Citizens (NRC) and the National Population Register (NPR).

Diocesan Centre for Social Communications Media, a wing of the Goa Church, in a statement on Saturday said, "The Archbishop and the Catholic community of Goa would like to appeal to the government to listen to the voice of millions in India, to stop quashing the right to dissent and, above all, to immediately and unconditionally revoke the CAA and desist from implementing the NRC and the NPR."

The CAA, NRC and NPR are "divisive and discriminatory" and will certainly have a "negative and damaging effect" on a multi-cultural democracy like ours, the church said.

There is serious concern that NRC and NPR will result in "direct victimisation of the underprivileged classes, particularly Dalits, adivasis, migrant labourers, nomadic communities and the countless undocumented people who, after having been recognised as worthy citizens and voters for more than 70 years, will suddenly run the risk of becoming stateless and candidates for detention camps," it said.

There has been widespread discontent and open protests throughout the country and even abroad against the CAA, NRC and NPR, which are "forecasting a systematic erosion of values, principles and rights" that have been guaranteed to all citizens in the Constitution, the release said.

Eminent citizens, including top intellectuals and legal luminaries, have taken a studied and unequivocal stand against the CAA, NRC and NPR, it noted.

Goa also witnessed several protests, which transcended the confines of religious and caste affiliation and brought people from all walks of life together on one united platform, said the statement.

It said Christians in India have always been a peace loving community and deeply committed to the ideals of justice, liberty, equality and fraternity, enshrined in the
Constitution.

"We have always taken great pride that our beloved country is a secular, sovereign, socialist, pluralistic anddemocratic republic," the church said.

The very fact that CAA uses religion goes against the secular fabric of the country, it said.

"It goes against the spirit and heritage of our land which, since times immemorial, has been a welcoming home to all, founded on the belief that the whole world is one big family," the church said.

"We pray for our beloved country, that good sense, justice and peace prevail in the hearts and minds of all," it added.