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1,000 doses of Covishield vaccine found frozen, damaged at cold storage in Assam
Guwahati: Around 1,000 doses of the Covishield vaccine were found damaged at the Silchar Medical College & Hospital (SMCH) in Assam’s Cachar district. The vaccine doses were found lying frozen in the vaccine store unit of SMCH.
und 1,000 doses of the Covishield vaccine were found damaged at the Silchar Medical College & Hospital (SMCH) in Assam’s Cachar district. The vaccine doses were found lying frozen in the vaccine store unit of SMCH.

According to reports, about 100 vials of Covishield vaccine, containing 1,000 doses, were stored at sub-zero temperatures. The Covishield vaccine require to be stored at a temperature of 2-8 degrees Celsius, but the temperature of the ILR at Silchar Medical College & Hospital went below zero.

A health official at Cachar district said that the vaccines were found partially frozen.

“There might be some technical fault of the Ice-Lined Refrigerator (ILR). We generally regulate the temperature of ILR between 2-8 degrees Celsius. When the temperature goes down, the ILR machine sends a message. But our vaccinator didn’t get any message and most probably it was a technical fault. The vaccines were stored the whole night and somehow the temperatures had dropped,” the health official said.

Meanwhile, Assam health department has decided to send another batch of 100 vials of the Covishield containing 1,000 doses to the Silchar Medical College & Hospital as replacement.

On the other hand, the state health department has sought a report from the hospital authority following the incident.


China’s vaccines may have ‘appeal’ in developing countries, economist says

An exhibitor shows inactivated COVID-19 vaccine candidate from China National Biotec Group of Sinopharm Group during the 2020 China International Fair for Trade in Services at the Beijing Olympic Park on September 5, 2020 in Beijing, China.
Getty Images —- Developing countries may have face a long wait if they want a vaccine developed in the West, but there’s always the option of turning to China, says an economist from DBS.
Beijing’s willingness to provide vaccines to developing countries adds to the appeal of the China’s vaccines, said Taimur Baig of DBS Group Research.
China has not released much data on the efficacy of its home-grown vaccines and not a lot of scientific information about them is readily available.

By Han Haidan | China News Service —
SINGAPORE – Developing countries may face a long wait if they want a vaccine made in the West, but there’s always the option of turning to China , says an economist from DBS.

“Considering the billions of doses needed, and the risk [of] falling at the back of a very long line for Western vaccines, the appeal of the Chinese vaccines is apparent,” Taimur Baig, chief economist and managing director at DBS Group Research, said in a note.

There will be a rush to procure Western vaccines when they’re approved by regulators, and poorer countries may find them unaffordable.

According to Citi, developed countries have collectively secured 85% of total bilateral pre-orders of coronavirus vaccines. Countries such as the U.S., U.K., Australia, Canada, Japan and those in the European Union have ordered supplies that exceed their populations, Citi said.

China has five home-grown vaccine candidates in phase three trials, according to the Ministry of Foreign Affairs. That’s usually the last step before government regulators vet the vaccine for approval.

Sinopharm, or China National Pharmaceutical Group, reportedly submitted an application to Chinese authorities last week seeking approval. The firm has two vaccine candidates, but it’s unclear if both are being considered for regulatory approval.

Beijing has already promised to help countries including Cambodia and Malaysia.N

‘Unconventional’ approach
Based on late-stage trials, Moderna as well as Pfizer-BioNTech announced this month that their vaccine candidates are more than 90% effective against Covid-19.

China has not released much data on the efficacy of its home-grown vaccines, and little scientific information about them is readily available. The state-controlled Global Times this month published a story touting China’s vaccines as “very effective.”

According to Reuters, the country has allowed three vaccines to be given to limited groups under an emergency use program. Nearly one million people have received an experimental vaccine developed by Sinopharm, Reuters reported, citing the company.

Such an approach is “unconventional,” said Dale Fisher, a professor in the National University of Singapore’s Yong Loo Lin School of Medicine.

“It is normal to wait for an analysis of phase three trials before ramping up a vaccine program through emergency use authorization,” said Fisher, who is also chair of the World Health Organization (WHO) Global Outbreak Alert and Response Network.

Fisher told CNBC in an email that said such a move would be “unacceptable” in the West, but could fast track learning about the virus if there is good surveillance of those vaccinated.

“They will obtain a lot of data doing it this way, but it can be difficult to interpret in the absence of controls,” he added.

Phase 3 trials are best at determining the efficacy of the vaccine and the duration of its effectiveness, he said.

‘Vaccine diplomacy’
Still, Baig of DBS said lower costs and Chinese willingness to provide vaccines add their appeal.

Chinese pharmaceutical companies have relied on older methods than Moderna, Pfizer and BioNTech, which use messenger RNA technology. The latter’s production process is more capital-intensive, and the vaccines need to be stored at extremely low temperatures, said Baig.

Messenger RNA technology, known as mRNA for short, uses genetic material to trigger the body’s own infection-fighting process.

“Hence, [Chinese vaccines] are likely to be cost competitive and logistically easier to handle,” he said.

Additionally, China has signed agreements to test and produce vaccines in countries such as Indonesia, Pakistan and Mexico.

Beijing also joined Covax, a vaccine alliance backed by the World Health Organization, which seeks to grant equal access to all participating countries when a vaccine is developed. The goal is to provide a lifeline to lower-income countries who would not have been able to afford these vaccines otherwise.

Baig said China needs a “big diplomatic, image-boosting win” in 2021. That could include debt-rollover or partial forgiveness for poor countries.

“But a far wider-reaching move would be to aggressively produce and deliver vaccines worldwide,” he said, adding that the bank expects a lot of “vaccine diplomacy” from China next year .

— CNBC’s Yen Nee Lee contributed to this report.


Four Exotic Items From the India-China Border in Arunachal Pradesh

Herbs, fungi, musk deer and bears attract local risk-takers looking to make a living.

By Rajeev Bhattacharyya

Five men who went missing in India’s border state of Arunachal Pradesh last month were handed over by China after 10 days’ detention.

Different versions have been articulated as to the reasons that led the youths to visit the hilly border which is a bone of contention between the two neighbors.

The Indian Army’s account that the five residents were on a hunting trip does not tally with the account of their families who said they were porters for the army.

The controversy notwithstanding, what is certain is that the local residents of the border state are employed as porters and guides by both the army and Indo Tibetan Border Police (ITBP) during long range patrols to the border that sometimes take weeks to complete.

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Many porters engage in hunting and gathering of items during the itinerary that sell at exorbitant rates in the international market. There are also separate expeditions mounted every year by squads of locals to certain zones along the border.

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This is not the first time that residents of Arunachal Pradesh were whisked away by Chinese troops and released after days of detention. A similar incident happened last March when three men were apprehended after they had gone to collect herbs along the border.

A significant stretch of the 1126-kilometres of the border in Arunachal Pradesh is inaccessible but also a treasure-trove of exotic items that prompt a large section of people to embark upon hunting assignments every year.

These commodities are sold to agents in some district headquarters who are part of a network that connect the state capital of Itanagar and Dibrugarh in Assam. The items are believed to be smuggled out of the country through multiple routes in Myanmar and Nepal.

Four items, in particular, scattered along the entire border in Arunachal Pradesh are sought after by the hunters. Occasionally, tales are heard in the border hamlets about hazardous missions when hunters meet with accidents never to return home.

Paris Polyphylla: The Marvelous Herb

Paris polyphylla is the most easily available among the four items which has been listed as a vulnerable medicinal plant by the International Union for Conservation of Nature (IUCN). Termed locally as “Rinke” and “Kola Kochu,” it grows mainly in moist and shady areas of forests, thickets, bamboo forests, grassy or rocky slopes and nearby water channel in rich humus soil.

An official said that Paris polyphylla is found in almost all districts of Arunachal Pradesh but more in Upper Subansiri, Upper Siang and Dibang Valley. A study carried out by the Rajiv Gandhi University found the existence of four varieties of the herb in the hill state that grows at an altitude of 1000-3500 meters.

A kilogram of Paris polyphylla fetches 4,000-5,000 Indian rupees either in Arunachal Pradesh or Assam. Concerned over the rampant smuggling of the plant, environment and forest minister of the state Nabam Rebia said two years ago that efforts were being made to formulate guidelines and modalities for cultivation, harvesting and commercialization of important medicinal plants including Paris polyphylla.

Yarsagumba: The Miracle Fungi

The trade in yarsagumba is a multibillion dollar industry spanning the U.S., China, and Singapore. It is a caterpillar-fungus fusion that occurs when a mushroom infects and embalms a ghost moth larva living in the soil. A wobbly fungus later sprouts from the dead caterpillar which is 2-6 centimeters long above the soil.

Used in traditional Chinese medicine, yarsagumba is believed to treat cancer, asthma and cure impotence. It is found in altitudes between 3,000 and 5,000 meters in Nepal, Tibet, Bhutan and India. It grows only for four months between May and August.

In Arunachal Pradesh, it is more available in the eastern districts of Tawang, East and West Kameng where the border is at a higher elevation than in the west. A kilogram of the item may be sold at a price as high as 400,000-500,000 Indian rupees.

Musk Deer and Asiatic Bear: Gems in the Hills

As rare as yarsagumba are the musk deer or Kasturi and the Asiatic bear which are among the most prized animals for the hunters of Arunachal Pradesh. IUCN has listed the musk deer as an endangered species and the Asiatic bear as vulnerable.

Like the other items, both animals are also used for the manufacture of traditional medicines in China and South East Asia. The adult male musk deer secretes musk used in a range of medicines and other products. Likewise, the bile of the bear is also used to manufacture medicines, and the Chinese government had recently recommended its use in the treatment of critical COVID-19 cases.

A local resident and hunter at Yinkiong was of the view that the population of both the animals has drastically reduced in Arunachal Pradesh. He pointed that about 10 grams of the navel of the musk deer could be sold for 35,000-40,000 to agents at certain locations in the state.

Notices by the government urging the local residents to abstain from hunting Musk Deer can be spotted in many villages near the border in Arunachal Pradesh.

Rajeev Bhattacharyya is a senior journalist in Assam, India


The Ten Fold Infectious D614G Mutation: What Does It Mean For COVID Spread, Vaccine Development?

Even as COVID-19 continues to spread globally, Malaysian authorities made a startling revelation yesterday about a 10 times more infectious strain of coronavirus traced back to South Asian countries, the ‘D614G’ coronavirus strain.

02/10D614G mutation could signify further spread of infection

While it’s still too early to confirm as to how consequential this novel coronavirus strain could be, it was observed that the person who broke his quarantine carried the same strain and infected as many as 45 people. The revelation spoke of what many experts were afraid of- the worst might be yet to come.

03/10How dangerous is the mutation right now?

In the past months, the strain has been found to be in circulation in New York and pockets of Italy, which were, at one point one of the worst affected cities globally and also witnessed high hospitalization and mortality rates and now, the infamous strain is gaining popularity for all the dangers it could expose us to. There are also contrasting researches which suggest that much like any other viral strain, D614G could be nothing but a similar viral mutation which could only affect a small group of people. But the actual question which remains at large is- how much of a real threat does it actually pose for humanity?

Here is a detailed explainer which can throw some light on what we can expect about the infamous coronavirus mutation.

04/10Why the name ‘D614G’?

The novel coronavirus, much like other viruses undergoes many mutations through its life-cycle. However, till date, the one single strain which was termed dangerous has been D614G.

Malaysian sighting doesn’t make it the first time scientists have sounded alarm over the dangerous infection strain. Early reports suggested that as many as 97% of samples collected carried this strain. The virus mutation was first observed in February in some places across Europe when the virus has started to spread to countries across the world.

Technically, D614G is a mutation of the COVID-19 causing SARS-COV-2 virus, present between the virus’s spike protein, which is used to enter into the host cells. The naming of the mutation is primarily due to its chemical make-up. According to science experts, the viral mutation changes the positioning of the amino acid at ‘614’ from D (which stands for aspartic acid) to G (glycine). Hence, the mutation is earmarked as D614G.

05/10Is it more transmissible and infectious?

A study published in the scientific journal, Cell, observed that of 999 samples tested across the UK, patients who were detected with the D614G strain had a higher viral load than others. Another study published in the same journal also correlates to the fact that a higher viral capacity may showcase greater infectivity patterns. As compared to the original strain of the virus ‘Wuhan 1’, the present viral strain could infect up to 4 cell lines (under lab study) and is 10 times more infectious.

However, it should be noted that while these studies were conducted to study cell culture in a confined lab study, so it could be difficult to correlate actual viral spread in humans as of now. There is no evidence as yet which suggests the same.

06/10Is the mutation harder to detect or diagnose?

Interestingly, while the viral strain has been associated to infect far more people in one cluster than previously observed, scientists have observed that a higher viral load did not correlate with higher disease severity. Hence, while the virus strain may be more infectious than any other strain in circulation, it isn’t associated with strong fatality rates.

Other researches conducted in the USA and UK found that the D614G mutation, found in samples across New York and sections of Italy had similar hospitalization rates as previous mutations of the SARS-COV-2 virus.

07/10Would treatment pose a problem?

One of the biggest complexities surrounding the same is about diagnosis and treatment. If the mutation is difficult to treat, it could shoot up fatality rates. However, no such correlation has been observed up until now. While the mutation made no significant impact on hospitalization, it was seen that pre-existing medical conditions and certain factors such as sex and age did increase a person’s risk of catching or developing COVID-19.

The same way, most of the experimental or repurposed drugs used till now did not show any reduced efficacy depending on the viral load. More research will be needed before we concluded whether or not this specific mutation is relatively harder to treat or not.

08/10What does it mean for vaccine development?

Whenever a virus mutation comes to light, it raises queries about how challenging could it prove to be in terms of vaccine development. For the unknown, vaccines are usually devised out of a more traditional or early isolated strains of a virus. In a timeline like the one we are facing right now, when we don’t have a vaccine ready, there are also looming questions whether or not we would now be needing different vaccines for different strains of the virus, making it all the more difficult to get a vaccine ready for the masses.

09/10Mutations won’t largely affect how a vaccine works

However, biologists, so far, have been quick to confirm that while the mutation brings about changes to the spike protein structure, no such changes have been observed with the ACE2 receptors, which is a critical target of the immune system and hence, any mutation is unlikely to bring around changes to immunogenicity. This would mean that any vaccine would most probably be effective in fighting the virus.

Again, as long as the mutations aren’t aggressive, vaccines could still work in protecting populations from infections and reinfections to a certain extent. It all depends on the vaccine’s efficacy rates.

10/10The bottomline

To conclude, the current virus mutation in question, D614G might be far more infectious but whether or not it could mean a definite spike in the viral load in humans is still inconclusive. Novel coronavirus, regardless of what mutation might be in circulation, is still scary and bringing in non-pharmaceutical measures such as social distancing, quarantines and of course, disinfection could help curb the spread of the viral infection by a big margin.

01/9​Post-COVID care: 7 things you MUST do after recovering from coronavirus

With 22,057,685 coronavirus cases across the globe and 7, 77,535 fatalities, the pandemic is still raging in many parts of the world. Even as doctors and medical experts across the globe continue to learn more about the novel coronavirus with every passing day, there is still no clear answer to the long term implications of COVID-19. It has been more than 8 months since the novel coronavirus first erupted in China and since then it has been established that the disease attacks the entire body. As COVID-19 is a novel disease and vastly different from a regular viral fever, there are not enough studies which underline the long-term effects of the disease.


Russian vaccine not in advanced stages, says WHO

WHO and partners have included nine experimental COVID-19 vaccines within an investment mechanism it is encouraging countries to join, known as the Covax facility. The initiative allows countries to invest in several vaccines to obtain early access, while theoretically providing funding for developing countries. The World Health Organization says the vaccine approved by Russia this week is not among the nine that it considers in the advanced stages of testing.

WHO and partners have included nine experimental COVID-19 vaccines within an investment mechanism it is encouraging countries to join, known as the Covax facility. The initiative allows countries to invest in several vaccines to obtain early access, while theoretically providing funding for developing countries.

“We don’t have sufficient information at this point to make a judgment” on the Russia vaccine, said Dr. Bruce Aylward, a senior adviser to WHO’s director-general.

“We’re currently in conversation with Russia to get additional information to understand the status of that product, the trials that have been undertaken and then what the next steps might be.”

This week, President Vladimir Putin announced Russia had approved a coronavirus vaccine that has yet to complete advanced trials in people and claimed, without evidence, the immunization protects people for up to two years.


Russia Claims 1st Covid Vaccine “Sputnik V”; Putin’s Daughter Inoculated

Russian vaccine works effectively enough: President Putin
A Russian health care regulator has become the first in the world to approve a vaccine for the coronavirus, President Vladimir V. Putin announced on Tuesday, though the vaccine has yet to complete clinical trials.

The Russian dash for a vaccine has already raised international concerns that Moscow is cutting corners on testing to score political and propaganda points.

Mr. Putin’s announcement came despite a caution last week from the World Health Organization that Russia should not stray from the usual methods of testing a vaccine for safety and effectiveness.

Mr. Putin’s announcement became essentially a claim of victory in the global race for a vaccine, something Russian officials have been telegraphing for several weeks now despite the absence of published information about any late-phase testing.

“It works effectively enough, forms a stable immunity and, I repeat, it has gone through all necessary tests,” Mr. Putin told a cabinet meeting Tuesday morning. He thanked the scientists who developed the vaccine for “this first, very important step for our country, and generally for the whole world.”

Mr. Putin also said that one of his daughters had taken the vaccine.

The Russian vaccine, along with many others under development in a number of countries in the effort to alleviate a worldwide health crisis that has killed at least 734,900 people, sped through early monkey and human trials with apparent success.

But the Russian scientific body that developed the vaccine, the Gamaleya Institute, has yet to conduct Phase III tests on tens of thousands of volunteers in highly controlled trials, a process seen as the only method of ensuring a vaccine is actually safe and effective. Around the world, more than 30 vaccines out of a total of more than 165 under development are now in various stages of human trials.

Vaccines generally go through three stages of human testing before being approved for widespread use. The first two phases test the vaccine on relatively small groups of people to see if it causes harm and if it stimulates the immune system. The last phase, known as Phase III, compares the vaccine to a placebo in thousands of people. This final phase is the only way to know with statistical certainty whether a vaccine prevents an infection. And because it’s testing a much larger group of people, a Phase III trial can also pick up more subtle side effects of a vaccine that earlier trials could not.

The Food and Drug Administration in the United States has said that a new coronavirus vaccine would need to be 50 percent more effective than a placebo in order to be approved.

Russia’s minister of health, Mikhail Murashko, has said the country will begin a mass vaccination campaign in the fall, and said on Tuesday that it would start with teachers and medical workers this month.

The World Health Organization maintains a comprehensive list of worldwide vaccine trials. In the latest version of the list, there is no Russian Phase III trial.

Western regulators have said repeatedly that they do not expect a vaccine to become widely available before the end of the year at the earliest. Regulatory approval in Russia, well ahead of that timeline, could become a symbol of national pride and provide a lift for Mr. Putin, whose popularity ratings have fallen steadily under the weight of the pandemic and a faltering economy.


Scientists figure out a weakness of coronavirus: Ordinary water

In a study, scientists discovered that about 90% of the Covid-19’s particles die in room temperature water in the course of 24 hours
Furthermore, scientists confirmed that boiling water containing Covid-19 kills it immediately and completely.

As the race for a potential Covid-19 vaccine continues in order to curb the spread of the novel coronavirus pandemic, scientists have managed to find out an important weakness of the virus, according to a report.

Researchers from Russia’s VECTOR State Research Center of Virology and Biotechnology in Novosibirsk, Siberia have figured out that ordinary water can help restrict the growth of the virus, according to Sputnik News report.

In their study, scientists discovered that about 90% of the virus’ particles die in room temperature water in the course of 24 hours, with 99.9% succumbing within 72 hours. Furthermore, scientists confirmed that boiling water containing Covid-19 kills it immediately and completely.

Significantly, researchers also found that although the virus does not multiply in dechlorinated and sea water, it can remain viable for some time, with its lifespan depending directly on the water’s temperature. Chlorinated water is also said to be highly effective at killing the virus, the report said.

The findings of the researchers were presented recently by Rospotrebnadzor, Russia’s consumer protection and human wellbeing watchdog.

In the Covid-19 vaccine front, the country has been showing significant results in vaccine trials.

According to reports, Russian Health Minister Mikhail Murashko said Gamaleya Institute of Epidemiology and Microbiology, a state research facility in Moscow, had completed clinical trials of the Covid-19 vaccine and paperwork is being prepared to register it.

He also said that they are preparing a mass vaccination campaign against the novel coronavirus for October, said Reuters citing local news agencies’ reports. Murashko adde that the authorities are considering getting doctors and teachers vaccinated against the virus first, according to a report.

A source told Reuters this week that Russia’s first potential Covid-19 vaccine would secure local regulatory approval in August and be administered to health workers soon thereafter.

Meanwhile, Russia registered 5,462 Covid-19 cases, bringing the cumulative total to 845,443, the country’s coronavirus response centre said on Saturday.

The country reported 95 new deaths from the novel coronavirus on Saturday, pushing its national tally to 14,058


Oxford University Scientists Say Coronavirus Vaccine Prompts Protective Immune Response in Early Test

Scientists at Oxford University say their experimental coronavirus vaccine has been shown in an early trial to prompt a protective immune response in hundreds of people who got the shot.

British researchers first began testing the vaccine in April in about 1,000 people, half of whom got the experimental vaccine. Such early trials are usually designed only to evaluate safety, but in this case experts were also looking to see what kind of immune response was provoked.

In research published Monday in the journal Lancet, scientists said that they found their experimental COVID-19 vaccine produced a dual immune response in people aged 18 to 55.

“We are seeing good immune response in almost everybody,” said Dr. Adrian Hill, director of the Jenner Institute at Oxford University. “What this vaccine does particularly well is trigger both arms of the immune system,” he said.

Hill said that neutralizing antibodies are produced — molecules which are key to blocking infection. In addition, the vaccine also causes a reaction in the body’s T-cells which help to fight off the coronavirus. He said that larger trials evaluating the vaccine’s effectiveness, involving about 10,000 people in the U.K. as well as participants in South Africa and Brazil are still underway. Another big trial is slated to start in the U.S. soon, aiming to enroll about 30,000 people.

How quickly scientists are able to determine the vaccine’s effectiveness will depend largely on how much more transmission there is, but Hill estimated they might have sufficient data by the end of the year to decide if the vaccine should be adopted for mass vaccination campaigns.

He said the vaccine seemed to produce a comparable level of antibodies to those produced by people who recovered from a COVID-19 infection and hoped that the T-cell response would provide extra protection.

“There’s increasing evidence that having a T-cell response as well as antibodies could be very important in controlling COVID-19,” Hill said. He suggested the immune response might be boosted after a second dose; their trial tested two doses administered about four weeks apart.

Hill said Oxford’s vaccine is designed to reduce disease and transmission. It uses a harmless virus — a chimpanzee cold virus, engineered so it can’t spread — to carry the coronavirus’ spike protein into the body, which should trigger an immune system response.

Hill said Oxford has partnered with drugmaker AstraZeneca to produce their vaccine globally, and that the company has already committed to making 2 billion doses.

“Even 2 billion doses may not be enough,” he said, underlining the importance of having multiple shots to combat the coronavirus.

“There was a hope that if we had a vaccine quickly enough, we could put out the pandemic,” Hill said, noting the continuing surge of infections globally. “I think its going to be very difficult to control this pandemic without a vaccine.”

Numerous countries including Germany, France, the Netherlands, Italy, U.S. and the U.K. have all signed deals to receive hundreds of millions of doses of the vaccine — which has not yet been licensed — with the first deliveries scheduled for the fall. British politicians have promised that if the shot proves effective, Britons will be the first to get it.

Last week, American researchers announced that the first COVID-19 vaccine tested there boosted people’s immune systems just as scientists had hoped and the shots will now enter the final phase of testing. That vaccine, developed by the National Institutes of Health and Moderna, produced the molecules key to blocking infection in volunteers who got it, at levels comparable to people who survived a COVID-19 infection.

About a dozen different experimental vaccines are in early stages of human testing or poised to start, mostly in China, the U.S. and Europe, with dozens more in earlier stages of development.

British officials said Monday they had also signed a deal to buy 90 million doses of experimental COVID-19 vaccines being developed by the pharmaceutical giant Pfizer and others.

In a statement, the British government said it had secured access to a vaccine candidate being developed by Pfizer and BioNTech, in addition to another experimental vaccine researched by Valneva.


WHO acknowledges ’emerging evidence’ of coronavirus transmission through air

GENEVA: The World Health Organization on Tuesday acknowledged “evidence emerging” of the airborne spread of the novel coronavirus, after a group of scientists urged the global body to update its guidance on how the respiratory disease passes between people.
“We have been talking about the possibility of airborne transmission and aerosol transmission as one of the modes of transmission of COVID-19,” Maria Van Kerkhove, technical lead on the COVID-19 pandemic at the WHO, told a news briefing.

The WHO has previously said the virus that causes the COVID-19 respiratory disease spreads primarily through small droplets expelled from the nose and mouth of an infected person that quickly sink to the ground.
But in an open letter to the Geneva-based agency, published on Monday in the Clinical Infectious Diseases journal, 239 scientists in 32 countries outlined evidence that they say shows floating virus particles can infect people who breathe them in.

Because those smaller exhaled particles can linger in the air, the scientists are urging WHO to update its guidance.
Speaking at Tuesday’s briefing in Geneva, Benedetta Allegranzi, the WHO’s technical lead for infection prevention and control, said there was evidence emerging of airborne transmission of the coronavirus, but that it was not definitive.

“…The possibility of airborne transmission in public settings – especially in very specific conditions, crowded, closed, poorly ventilated settings that have been described, cannot be ruled out,” she said.
“However, the evidence needs to be gathered and interpreted, and we continue to support this.”

Any change in the WHO’s assessment of risk of transmission could affect its current advice on keeping 1-metre (3.3 feet) of physical distancing. Governments, which rely on the agency for guidance policy, may also have to adjust public health measures aimed at curbing the spread of the virus.
Van Kerkhove said the WHO would publish a scientific brief summarising the state of knowledge on modes of transmission of the virus in the coming days.
“A comprehensive package of interventions is required to be able to stop transmission,” she said.
“This includes not only physical distancing, it includes the use of masks where appropriate in certain settings, specifically where you can’t do physical distancing and especially for healthcare workers.”