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COVID-19 can remain infectious on bank notes, other surfaces for weeks: study

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TORONTO —
A new study looking at how long the novel coronavirus can survive on surfaces found that it can remain infectious on some surfaces — including bank notes — for at least 28 days, provided the temperature is right.

Published this week in the Virology Journal, the new paper describes how researchers tested the virus on several surfaces, including cotton and bank notes, at numerous temperatures in order to measure the lifespan of the virus under these different circumstances.

They found that the virus dies significantly faster on surfaces in hotter temperatures, and can survive on several non-porous surfaces for up to four weeks — much longer than previous studies have indicated.

Overwhelmingly, evidence has shown that the primary way COVID-19 is spread is through droplets and through sharing air with others, but that hasn’t stopped the fear of surface transmission. Hand washing is still one of the most important prevention methods that health officials tout.

Previous studies have looked at how long SARS-CoV-2, the virus that causes COVID-19, remains infectious on different surfaces, with some studies finding it to be a matter of hours, and others saying it could be days.

In this study, the surfaces researchers tested the virus on included Australian bank notes — which, like Canadian bank notes, are polymer — paper bank notes, glass, vinyl, stainless steel and cotton.

Researchers noted that they wanted to include money because it is an object that travels frequently between different people. Stainless steel, vinyl and glass are materials found in most public spaces, and cotton is often found in clothing and bedding.

When a virus gets onto a surface, it is often through a sneeze or through droplets expelled from the mouth. Researchers diluted SARS-CoV-2 “in a defined organic matrix […] designed to mimic the composition of body secretions” before placing it onto the materials to measure the longevity.

They noted in the paper that the concentration of the virus in each sample was high, it still “represents a plausible amount of virus that may be deposited on a surface.”

Samples of each material with the virus on it were placed into a “humidified climate chamber” so a set humidity of 50 per cent relative humidity could be maintained while the samples were tested at different temperatures and timeframes.

Samples were tested at 20, 30 and 40 degrees Celsius, and were inspected 1 hour, 3 days, 7 days, 14 days, 21 days and 28 days after the virus had first been introduced to the material.

Researchers found that at 20 degrees Celsius, the virus could survive for at least 28 days on every material except for cotton, the most porous of the materials tested.

SARS-CoV-2 couldn’t be detected on cotton after 14 days had passed.

“The majority of virus reduction on cotton occurred very soon after application of virus, suggesting an immediate absorption effect,” the report said.

Does this mean every bank note in our wallets could infect us? According to Colin Furness, an infection control epidemiologist at the University of Toronto, we shouldn’t jump straight to alarm.

“What we’re seeing empirically, clinically, with contact tracing, is that COVID is not spreading heavily through touch,” he said.

It is possible to contract the virus through surfaces, he said, “but it’s not happening very often.”

He said that earlier in the pandemic, when we had a looser understanding of the virus, there was a bigger fear of things like groceries or the mail in terms of surface transmission. But at this point, we have a greater understanding of how COVID-19 predominantly spreads.

“It’s shared airspace,” Furness said. “It’s droplet and aerosols and shared air with poor ventilation and prolonged contact. That’s how you get sick. That’s the thing to be scared of, which is why I’ve been very, very worried about indoor dining. And it’s not because you might touch contaminated cutlery. It’s because you’re in this room with a lot of other people and not wearing a mask and sharing air.”

This study carried out its experiments at a lab at the Australian Centre for Disease Preparedness, with the samples in complete darkness “to negate any effects of UV light” — just one way that the conditions of the experiments differed from real life.

“[This study] tells you what can happen under laboratory conditions,” Furness said.

A bank note in your pocket or your wallet is rubbing up against other things, he explained, not sitting undisturbed to measure the longevity of a virus. If surfaces are exposed to sunlight as well, that can aid with a faster decay of any virus on the surface.

These studies are the first step, he said, and then researchers “need to test in the real world. What is the real significance of this?

“And those numbers are usually quite different.”

The raw numbers of the study also don’t paint the full picture. Although the virus was still detectable on most surfaces at the 28 day mark, it reduced in concentration much faster than that.

“Viruses aren’t alive,” Furness said. “They can’t regenerate, they can’t metabolize or protect themselves as soon as they leave your body. As soon as you exhale some virus, the virus starts to die.”

The half-life of the virus (the time it takes for it to reduce by 50 per cent) on a paper bank note at 20 degrees Celsius was 2.74 days, showing the viral load decreases in concentration far faster than the 28 days would suggest. After 9.13 days, 90 per cent of the virus was gone.

On cotton, at 20 degrees Celsius, the half-life was 1.68 days, and it took 5.57 days for a 90 per cent reduction in the virus.

Five to nine days is still a long time for a virus to remain infectious on a surface, although it’s still unknown at what point the viral load would be too small to actually make a person ill.

Researchers said in the paper that the extended half-life in this study compared to others could be down to the controlled conditions that they created for the experiment.

While this study does not mean we should panic about surface transmission, which remains one of the rarer ways to transmit the virus, it does provide insight into how temperature interacts with the virus’ survivability.

Researchers did not measure any of the virus samples at less than 20 degrees Celsius, but they observed how much the rate of virus decline sped up when the temperature increased from 30 to 40 degrees Celsius. Extrapolating backwards from that, they posit that if the temperature dropped significantly from 20 degrees Celsius, the lifespan of the virus on various surfaces could increase.

“This data could therefore provide a reasonable explanation for the outbreaks of COVID-19 surrounding meat processing and cold storage facilities,” they theorize.

Furness said the temperature is a huge factor when it comes to a virus’ survivability.

“In the winter, in freezing temperatures, COVID will last [longer] on surfaces,” he said.

“So if you’re going to a playground in the winter, it can be quite worrisome. I wonder whether we’re going to see that COVID does spread more by touch in the winter. I can’t say that it does, but it’s entirely possible that it will.”

He said the concept of temperature is something that hasn’t been emphasized enough as Canada begins to tackle its second wave.

“It’s not just the numbers are going up,” he said. “Numbers are going up, while temperatures are going down.”

The best thing to do?

“We should continue to wash our hands and be vigilant,” Furness said. “In fact, during COVID, I would say the best outcome of washing your hands is actually so you don’t get any other colds that would make you afraid that maybe you have COVID.”

Source: – CTV News

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Health Canada approves updated Moderna COVID-19 vaccine

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TORONTO – Health Canada has authorized Moderna’s updated COVID-19 vaccine that protects against currently circulating variants of the virus.

The mRNA vaccine, called Spikevax, has been reformulated to target the KP.2 subvariant of Omicron.

It will replace the previous version of the vaccine that was released a year ago, which targeted the XBB.1.5 subvariant of Omicron.

Health Canada recently asked provinces and territories to get rid of their older COVID-19 vaccines to ensure the most current vaccine will be used during this fall’s respiratory virus season.

Health Canada is also reviewing two other updated COVID-19 vaccines but has not yet authorized them.

They are Pfizer’s Comirnaty, which is also an mRNA vaccine, as well as Novavax’s protein-based vaccine.

This report by The Canadian Press was first published Sept. 17, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

The Canadian Press. All rights reserved.

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These people say they got listeria after drinking recalled plant-based milks

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TORONTO – Sanniah Jabeen holds a sonogram of the unborn baby she lost after contracting listeria last December. Beneath, it says “love at first sight.”

Jabeen says she believes she and her baby were poisoned by a listeria outbreak linked to some plant-based milks and wants answers. An investigation continues into the recall declared July 8 of several Silk and Great Value plant-based beverages.

“I don’t even have the words. I’m still processing that,” Jabeen says of her loss. She was 18 weeks pregnant when she went into preterm labour.

The first infection linked to the recall was traced back to August 2023. One year later on Aug. 12, 2024, the Public Health Agency of Canada said three people had died and 20 were infected.

The number of cases is likely much higher, says Lawrence Goodridge, Canada Research Chair in foodborne pathogen dynamics at the University of Guelph: “For every person known, generally speaking, there’s typically 20 to 25 or maybe 30 people that are unknown.”

The case count has remained unchanged over the last month, but the Public Health Agency of Canada says it won’t declare the outbreak over until early October because of listeria’s 70-day incubation period and the reporting delays that accompany it.

Danone Canada’s head of communications said in an email Wednesday that the company is still investigating the “root cause” of the outbreak, which has been linked to a production line at a Pickering, Ont., packaging facility.

Pregnant people, adults over 60, and those with weakened immune systems are most at risk of becoming sick with severe listeriosis. If the infection spreads to an unborn baby, Health Canada says it can cause miscarriage, stillbirth, premature birth or life-threatening illness in a newborn.

The Canadian Press spoke to 10 people, from the parents of a toddler to an 89-year-old senior, who say they became sick with listeria after drinking from cartons of plant-based milk stamped with the recalled product code. Here’s a look at some of their experiences.

Sanniah Jabeen, 32, Toronto

Jabeen says she regularly drank Silk oat and almond milk in smoothies while pregnant, and began vomiting seven times a day and shivering at night in December 2023. She had “the worst headache of (her) life” when she went to the emergency room on Dec. 15.

“I just wasn’t functioning like a normal human being,” Jabeen says.

Told she was dehydrated, Jabeen was given fluids and a blood test and sent home. Four days later, she returned to hospital.

“They told me that since you’re 18 weeks, there’s nothing you can do to save your baby,” says Jabeen, who moved to Toronto from Pakistan five years ago.

Jabeen later learned she had listeriosis and an autopsy revealed her baby was infected, too.

“It broke my heart to read that report because I was just imagining my baby drinking poisoned amniotic fluid inside of me. The womb is a place where your baby is supposed to be the safest,” Jabeen said.

Jabeen’s case is likely not included in PHAC’s count. Jabeen says she was called by Health Canada and asked what dairy and fresh produce she ate – foods more commonly associated with listeria – but not asked about plant-based beverages.

She’s pregnant again, and is due in several months. At first, she was scared to eat, not knowing what caused the infection during her last pregnancy.

“Ever since I learned about the almond, oat milk situation, I’ve been feeling a bit better knowing that it wasn’t something that I did. It was something else that caused it. It wasn’t my fault,” Jabeen said.

She’s since joined a proposed class action lawsuit launched by LPC Avocates against the manufacturers and sellers of Silk and Great Value plant-based beverages. The lawsuit has not yet been certified by a judge.

Natalie Grant and her seven year-old daughter, Bowmanville, Ont.

Natalie Grant says she was in a hospital waiting room when she saw a television news report about the recall. She wondered if the dark chocolate almond milk her daughter drank daily was contaminated.

She had brought the girl to hospital because she was vomiting every half hour, constantly on the toilet with diarrhea, and had severe pain in her abdomen.

“I’m definitely thinking that this is a pretty solid chance that she’s got listeria at this point because I knew she had all the symptoms,” Grant says of seeing the news report.

Once her daughter could hold fluids, they went home and Grant cross-checked the recalled product code – 7825 – with the one on her carton. They matched.

“I called the emerg and I said I’m pretty confident she’s been exposed,” Grant said. She was told to return to the hospital if her daughter’s symptoms worsened. An hour and a half later, her fever spiked, the vomiting returned, her face flushed and her energy plummeted.

Grant says they were sent to a hospital in Ajax, Ont. and stayed two weeks while her daughter received antibiotics four times a day until she was discharged July 23.

“Knowing that my little one was just so affected and how it affected us as a family alone, there’s a bitterness left behind,” Grant said. She’s also joined the proposed class action.

Thelma Feldman, 89, Toronto

Thelma Feldman says she regularly taught yoga to friends in her condo building before getting sickened by listeria on July 2. Now, she has a walker and her body aches. She has headaches and digestive problems.

“I’m kind of depressed,” she says.

“It’s caused me a lot of physical and emotional pain.”

Much of the early days of her illness are a blur. She knows she boarded an ambulance with profuse diarrhea on July 2 and spent five days at North York General Hospital. Afterwards, she remembers Health Canada officials entering her apartment and removing Silk almond milk from her fridge, and volunteers from a community organization giving her sponge baths.

“At my age, 89, I’m not a kid anymore and healing takes longer,” Feldman says.

“I don’t even feel like being with people. I just sit at home.”

Jasmine Jiles and three-year-old Max, Kahnawake Mohawk Territory, Que.

Jasmine Jiles says her three-year-old son Max came down with flu-like symptoms and cradled his ears in what she interpreted as a sign of pain, like the one pounding in her own head, around early July.

When Jiles heard about the recall soon after, she called Danone Canada, the plant-based milk manufacturer, to find out if their Silk coconut milk was in the contaminated batch. It was, she says.

“My son is very small, he’s very young, so I asked what we do in terms of overall monitoring and she said someone from the company would get in touch within 24 to 48 hours,” Jiles says from a First Nations reserve near Montreal.

“I never got a call back. I never got an email”

At home, her son’s fever broke after three days, but gas pains stuck with him, she says. It took a couple weeks for him to get back to normal.

“In hindsight, I should have taken him (to the hospital) but we just tried to see if we could nurse him at home because wait times are pretty extreme,” Jiles says, “and I don’t have child care at the moment.”

Joseph Desmond, 50, Sydney, N.S.

Joseph Desmond says he suffered a seizure and fell off his sofa on July 9. He went to the emergency room, where they ran an electroencephalogram (EEG) test, and then returned home. Within hours, he had a second seizure and went back to hospital.

His third seizure happened the next morning while walking to the nurse’s station.

In severe cases of listeriosis, bacteria can spread to the central nervous system and cause seizures, according to Health Canada.

“The last two months have really been a nightmare,” says Desmond, who has joined the proposed lawsuit.

When he returned home from the hospital, his daughter took a carton of Silk dark chocolate almond milk out of the fridge and asked if he had heard about the recall. By that point, Desmond says he was on his second two-litre carton after finishing the first in June.

“It was pretty scary. Terrifying. I honestly thought I was going to die.”

Cheryl McCombe, 63, Haliburton, Ont.

The morning after suffering a second episode of vomiting, feverish sweats and diarrhea in the middle of the night in early July, Cheryl McCombe scrolled through the news on her phone and came across the recall.

A few years earlier, McCombe says she started drinking plant-based milks because it seemed like a healthier choice to splash in her morning coffee. On June 30, she bought two cartons of Silk cashew almond milk.

“It was on the (recall) list. I thought, ‘Oh my God, I got listeria,’” McCombe says. She called her doctor’s office and visited an urgent care clinic hoping to get tested and confirm her suspicion, but she says, “I was basically shut down at the door.”

Public Health Ontario does not recommend listeria testing for infected individuals with mild symptoms unless they are at risk of developing severe illness, such as people who are immunocompromised, elderly, pregnant or newborn.

“No wonder they couldn’t connect the dots,” she adds, referencing that it took close to a year for public health officials to find the source of the outbreak.

“I am a woman in my 60s and sometimes these signs are of, you know, when you’re vomiting and things like that, it can be a sign in women of a bigger issue,” McCombe says. She was seeking confirmation that wasn’t the case.

Disappointed, with her stomach still feeling off, she says she decided to boost her gut health with probiotics. After a couple weeks she started to feel like herself.

But since then, McCombe says, “I’m back on Kawartha Dairy cream in my coffee.”

This report by The Canadian Press was first published Sept. 16, 2024.

Canadian Press health coverage receives support through a partnership with the Canadian Medical Association. CP is solely responsible for this content.

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B.C. mayors seek ‘immediate action’ from federal government on mental health crisis

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VANCOUVER – Mayors and other leaders from several British Columbia communities say the provincial and federal governments need to take “immediate action” to tackle mental health and public safety issues that have reached crisis levels.

Vancouver Mayor Ken Sim says it’s become “abundantly clear” that mental health and addiction issues and public safety have caused crises that are “gripping” Vancouver, and he and other politicians, First Nations leaders and law enforcement officials are pleading for federal and provincial help.

In a letter to Prime Minister Justin Trudeau and Premier David Eby, mayors say there are “three critical fronts” that require action including “mandatory care” for people with severe mental health and addiction issues.

The letter says senior governments also need to bring in “meaningful bail reform” for repeat offenders, and the federal government must improve policing at Metro Vancouver ports to stop illicit drugs from coming in and stolen vehicles from being exported.

Sim says the “current system” has failed British Columbians, and the number of people dealing with severe mental health and addiction issues due to lack of proper care has “reached a critical point.”

Vancouver Police Chief Adam Palmer says repeat violent offenders are too often released on bail due to a “revolving door of justice,” and a new approach is needed to deal with mentally ill people who “pose a serious and immediate danger to themselves and others.”

This report by The Canadian Press was first published Sept. 16, 2024

The Canadian Press. All rights reserved.

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