Sharjah ruler promises to release 149 Indian prisoners

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.

New Delhi, May 13: Finance Minister Nirmala Sitharaman on Wednesday announced Rs 3 lakh crore collateral-free automatic loan for businesses, including MSMEs.

This will benefit 45 lakh small businesses, she said detailing parts of the Rs 20 lakh crore economic stimulus package.

The loan will have 4-year tenure and will have a 12-month moratorium, she said.

Also, Rs 20,000 crore subordinated debt will be provided for stressed MSMEs, she said adding this would benefit 2 lakh such businesses.

The Finance Minister said a fund of funds for MSME is being created, which will infuse Rs 50,000 crore equity in MSMEs with growth potentials.

Also, MSME definition has been changed to allow units with investment up to Rs 1 crore to be called micro-units in place of Rs 25 lakh now.

Also units with turnover up to Rs 5 crore to be called micro-units, she said, adding a turnover based criteria is being introduced to define small businesses.

The investment and turnover limits for small and medium businesses have likewise been raised to allow them to retain fiscal and other benefits, she said.

Global tenders will be banned for government procurement up to Rs 200 crore, she said, adding this would help MSMEs to compete and supply in government tenders.

Bengaluru, Apr 5: Chief Minister BS Yediyurappa on Saturday said the state government will double down for 100% compliance to the lockdown in the next 10 days, warning action against those found roaming the streets.

Dismissing reports of a shortage of ventilators, he said the state was bringing in reinforcements over the next few days and expressed relief that none of the Covid-19 patients of the state has required a ventilator so far.

"None of the Covid-19 patients are on ventilators; two of them require oxygen," Yediyurappa told reporters after he met ministers and MLAs of Bengaluru and apprised them of steps taken to fight the coronavirus pandemic.

The CM said the government had placed orders for 1,570 ventilators, of which 17 have been supplied and another 20 would arrive by next week. The government has also ordered 18.3 lakh N-95 masks, of which more than 4 lakh have been supplied. To ensure a steady supply of hand sanitiser, manufacturing licences have been issued to 36 pharma companies and 29 distilleries.

While the state readies the medical infrastructure, the CM urged the legislators, cutting across party lines, to ensure full compliance to the lockdown. "If people fail to cooperate with the government and respect the nationwide lockdown, there will be no option but to enforce it in a more stringent manner from Sunday," he said.

As people continue to crowd markets amid growing fears of a shortage of essentials, the CM reiterated that all measures have been put in place to get the supply chain moving. 

He also assured that food will be provided to migrant workers and the poor. "There is enough stock of foodgrains and medicine in the state. The government has set a taskforce of ministers, 17 committees under additional chief secretaries, several helplines and a war room to fight the pandemic and they are all working round the clock," he said. 

The government has also issued direction to authorities to provide rations to those who do not have BPL or APL cards. Since many people from other states have settled in Bengaluru and they don't have ration cards, we have taken this decision," Yediyurappa said.

On reports of many private hospitals being closed and refusing to treat patients, the CM said: "We have already warned private hospitals to remain open and provide treatment to patients failing which strict action will be initiated."

Kisan Nidhi, 2 months' pension by April 10
The CM said an installment of Rs 2,000 under PM Kisan Samman Nidhi Yojana and two months' pension under the various social security schemes will be credited to bank accounts of beneficiaries by April 10. 

The process of crediting subsidy to 15 lakh beneficiaries under Ujjwala Yojana is on, he said.