Here’s a primer that breaks down why B.C. is halting the use of the AstraZeneca vaccine in younger people, but at the same time accelerating the vaccination of other age groups using this vaccine
Author of the article:
Cheryl Chan
A health worker prepares a dose of the AstraZeneca vaccine in Madrid on March 24, 2021.Photo by GABRIEL BOUYS /AFP via Getty Images
Article content
On Monday, B.C. announced it was suspending the use of the AstraZeneca vaccine in people 55 and younger due to concerns over a “very rare” blood clot condition.
Here’s a primer that breaks down why B.C. is halting the use of the AstraZeneca vaccine in younger people, but at the same time accelerating the vaccination of other age groups using this vaccine.
Q: I got the AstraZeneca vaccine. What should I do?
A: If it has been more than 20 days since you received your AstraZeneca vaccine, you don’t need to worry.
If it has been less than 20 days, monitor yourself for symptoms and if you develop the following symptoms starting four to 20 days after receiving your shot, go to the nearest emergency department:
Severe headache that does not go away
Seizure
Difficulty moving parts of your body
Blurry vision that does not go away
Difficulty speaking
Shortness of breath
Chest pain
Severe abdominal pain
New severe swelling, pain, or colour change of an arm or a leg
Abnormal bruising, reddish or purple spots or blood blisters under the skin, or bleeding beyond the site of vaccination.
Advertisement
Story continues below
This advertisement has not loaded yet, but your article continues below.
If you have side effects such as pain, redness, itchiness or swelling at the injection site; swollen lymph nodes under the arm pit; tiredness or headache; fever and chills; muscle and joint soreness; nausea and vomiting — these are common symptoms that could surface a day or two after getting a COVID-19 vaccine. These symptoms should go away on their own.
Q: Why is B.C. stopping the use of the AstraZeneca vaccine for some people?
A: B.C. suspended the use of the AstraZeneca vaccine in people 55 and younger on Monday, acting on a recommendation from Canada’s National Advisory Committee on Immunization (NACI).
This comes amid new data from Europe that suggests the risk of blood clots is now potentially as high as one in 100,000 compared to the one in one million risk previously believed.
Called vaccine-induced prothrombotic immune thrombocytopenia (VIPIT), these rare events have happened primarily among women under the age of 55, with a mortality rate of 40 per cent, although experts say that risk will be reduced if the condition is spotted and treated early.
There has been fewer than 30 cases identified around the world, primarily in Europe.
There has been no reports of blood clot incidents in people who have received the AstraZeneca vaccine in B.C. or in Canada.
In the meantime, Health Canada has asked the drug maker to conduct a study on the risks and benefits of the vaccine across multiple age groups. NACI has recommended the shot be suspended for younger groups pending the outcome of the review.
Advertisement
Story continues below
This advertisement has not loaded yet, but your article continues below.
Article content
Q: Who has received the AstraZeneca shot in B. C.?
A: In early March, B.C. said it will use around 68,000 doses of the vaccine to curb outbreaks and at high-risk workplaces, such as food processing, agriculture and large industrial camps.
Q: What’s the deal with the negative news surrounding AstraZeneca?
A: The AstraZeneca vaccine was approved in Canada for adults on Feb. 26 under the brand names AstraZeneca COVID-19 Vaccine and COVISHIELD Vaccine.
From the start, it had to fight against a perception it’s a lower-tier drug because of lower efficacy results than its competitors. Trials showed the vaccine was 62 per cent effective against COVID-19 infections, but entirely prevented COVID-19 related hospitalizations and deaths.
Then there was confusion about whether the AstraZeneca vaccine was effective for seniors. NACI initially withheld its recommendation on the use of the vaccine for seniors, but later reversed its decision, citing new real-world evidence from the U.K. that showed the vaccine was effective.
In mid-March, European health authorities suspended use of the vaccine following reports of blood clots from people who have received the vaccine. Canadian health officials assured the public the vaccine is safe, as the very small number of people who experienced blood clots isn’t out of step with the normal rate of blood clots in the general population.
Advertisement
Story continues below
This advertisement has not loaded yet, but your article continues below.
Article content
On March 24, Health Canada revised its label for the AstraZeneca vaccine to add information about the “very rare reports of blood clots associated with low levels of blood platelets.” It says the shot remains safe and the benefits of getting the vaccine outweigh the risks.
On March 29, NACI recommended against the use of the vaccine in people age 55 and younger. B.C. and other provinces suspended its use for this demographic.
Q: Is AstraZeneca safe?
A: Health authorities maintain the vaccine is safe and effective.
“We know from the millions of doses used worldwide, and especially in the U.K., it is highly effective and the benefits to those over age 55 far outweigh the very real risks of getting COVID-19,” said Dr. Bonnie Henry. “I encourage everyone in the Lower Mainland who is between 55 and 65 years of age to receive their safe and effective COVID-19 vaccine today.”
Q: Is this going to delay the vaccination schedule for younger people?
A: On Monday, B.C. Premier John Horgan said suspension of use of AstraZeneca among those 55 and younger does not impact the vaccination schedule in the age-based vaccination program.
Pfizer and BioNTech plans to move up delivery of five million doses of their mRNA vaccine to Canada in June. The first shipments of Johnson & Johnson’s single-dose vaccine are set to arrive at the end of April. It is not yet known how many doses are in the first shipment nor how many of those doses will be allocated to B.C.
— with files from Postmedia News and Canadian Press
Share this article in your social network
Advertisement
Story continues below
This advertisement has not loaded yet, but your article continues below.
Vancouver Sun Headline News
Sign up to receive daily headline news from the Vancouver Sun, a division of Postmedia Network Inc.
By clicking on the sign up button you consent to receive the above newsletter from Postmedia Network Inc. You may unsubscribe any time by clicking on the unsubscribe link at the bottom of our emails. Postmedia Network Inc. | 365 Bloor Street East, Toronto, Ontario, M4W 3L4 | 416-383-2300
Thanks for signing up!
A welcome email is on its way. If you don’t see it please check your junk folder.
The next issue of Vancouver Sun Headline News will soon be in your inbox.
We encountered an issue signing you up. Please try again
Valero Energy Corp. and Chevron Corp. have entered the fray of buyers for oil traversing Canada’s expanded Trans Mountain Pipeline system, signaling a potential shift in the West Coast’s oil-sourcing landscape.
Anonymous Bloomberg sources revealed on Friday that these refineries in California are set to receive cargoes of Cold Lake crude, a heavy grade from Canada’s oil sands, loaded onto Aframax tankers out of the Westridge Terminal near Vancouver last June. This development marks the first sales off the expanded pipeline to Western US refiners, following earlier transactions with Asian buyers Sinopec Group and Sinochem Group.
The expanded Trans Mountain Pipeline, slated to commence commercial operations on May 1, has faced a litany of hurdles, including construction delays, cost overruns, and regulatory challenges. Despite yet-to-be-obtained approvals from the Canadian Energy Regulator, the pipeline’s capacity is set to nearly triple to 890,000 bpd, catering to a growing demand for oil transport from Alberta to Canada’s Pacific Coast. This expansion, originally valued at $33 billion, ballooned to $53 billion, reflecting the complexities and uncertainties of large-scale energy infrastructure projects.
While the pipeline expansion promises to open up international markets for Canadian oil producers, tensions have simmered between environmentalists and stakeholders advocating for increased pipeline capacity. The project’s approval sparked protests and political divisions, ultimately prompting the Canadian federal government’s intervention to ensure its realization. However, analysts caution that despite the expanded capacity, rising oil production, particularly from the oil sands, may swiftly fill the available pipeline space, underscoring ongoing challenges in balancing energy demand, environmental concerns, and market dynamics.
Back in February, when Trans Mountain first began filling the expanded pipeline, Canadian crude oil prices jumped to the narrowest discount to WTI since August 2023, eating into what once was cheap Canadian crude oil for U.S. refiners.
Since moving to B.C. from Colombia to go to university, Marylin Moreno has been a regular at Tim Hortons – and she always scans her app so she can play the iconic Roll Up To Win contest.
“I start to roll to see if I can win something, sometimes I have a coffee or a donut,” said Moreno.
On Wednesday, she got an email from Tim Hortons that stopped her in her tracks. “It said, ‘Congratulations, you’ve won four coffees, one donut, and a boat.’ I was like, a boat! Really?” said Moreno.
The prize was a $55,000 fishing boat and trailer. Shaking, Moreno went to the nearest Tim Hortons.
“And I asked them, is this real? I’m not sure it’s real. And they told me yes, it’s real,” said Moreno, who was told to call customer service and wait for further instructions on claiming her prize.
The let down came in an email hours later. “They said, ‘I’m so sorry, we made a mistake, you didn’t win the boat. Please ignore the email.’ And I went oh, my heart! I can’t believe it,“ said Moreno.
She learned she was among hundreds of Roll Up To Win players across the country who got the same email, congratulating them on winning the boat. In the email explaining the error, Tim Hortons said it was meant to be a simple recap of the contest.
The apology email went on to say: “Unfortunately, some of the prizes that you did not win may have been included in the recap email you received. If this was the case, today’s email does not mean you won those prizes.”
Moreno said she understands humans make mistakes, but pointed out this isn’t the first time. In 2023, some Roll Up To Win players were mistakenly told they won a $10,000 prize.
Lindsey Meredith, an SFU marketing professor emeritus, said the fact it’s now happened twice is troubling.
Marylin Moreno was among the false winners of the latest Tim Hortons Roll Up To Win promotion.
“If you start to get a bad reputation, collectively it starts to build. It hurts your brand, it hurts your ability to run future promotions, and it certainly can hurt market segments who get really annoyed when that fishing boat just sunk right underneath them,”said Meredith.
Last time, Tims offered $50 gift cards to the customers who were told they won the big prize and didn’t. Moreno said she hasn’t been offered anything.
“I’m waiting for at least something. Make a customer feel better, so OK you make a mistake, at least you give this customer something good, a gift card, something,” Moreno said.
Meredith agrees, saying: “We start to look at what can we do to make that customer happy again, and if that means giving out a lot of coffee cards, get ‘em out, gang. Because you’ve got a problem on your hands, and it’s lot more than a cup of coffee.”
Moreno said she won’t stop going to Tims, and she will continue to play Roll Up To Win, adding “I want to get a free coffee or free donut.”
But if she gets an email saying she won a bigger prize, she won’t get excited. “I don’t trust them,” she said. “It would be hard for me to believe this.”
FILE – An advertisement for the cryptocurrency Bitcoin displayed on a tram, May 12, 2021, in Hong Kong. Sometime in the next few days or even hours, the “miners” who chisel bitcoins out of complex mathematics are going to take a 50% pay cut — effectively slicing new emissions of the world’s largest cryptocurrency in an event called bitcoin halving. (AP Photo/Kin Cheung, File)
The “miners” who chisel bitcoins out of complex mathematics are taking a 50% pay cut — effectively reducing new production of the world’s largest cryptocurrency, again.
Bitcoin’s latest “halving” appeared to occur Friday night. Soon after the highly anticipated event, the price of bitcoin held steady at about $63,907.
Now, all eyes are on what will happen down the road. Beyond bitcoin’s long-term price behavior, which relies heavily on other market conditions, experts point to potential impacts on the day-to-day operations of the asset’s miners themselves. But, as with everything in the volatile cryptoverse, the future is hard to predict.
Here’s what you need to know.
WHAT IS BITCOIN HALVING AND WHY DOES IT MATTER?
Bitcoin “halving,” a preprogrammed event that occurs roughly every four years, impacts the production of bitcoin. Miners use farms of noisy, specialized computers to solve convoluted math puzzles; and when they complete one, they get a fixed number of bitcoins as a reward.
Halving does exactly what it sounds like — it cuts that fixed income in half. And when the mining reward falls, so does the number of new bitcoins entering the market. That means the supply of coins available to satisfy demand grows more slowly.
Limited supply is one of bitcoin’s key features. Only 21 million bitcoins will ever exist, and more than 19.5 million of them have already been mined, leaving fewer than 1.5 million left to pull from.
So long as demand remains the same or climbs faster than supply, bitcoin prices should rise as halving limits output. Because of this, some argue that bitcoin can counteract inflation — still, experts stress that future gains are never guaranteed.
HOW OFTEN DOES HALVING OCCUR?
Per bitcoin’s code, halving occurs after the creation of every 210,000 “blocks” — where transactions are recorded — during the mining process.
No calendar dates are set in stone, but that divvies out to roughly once every four years.
WILL HALVING IMPACT BITCOIN’S PRICE?
Only time will tell. Following each of the three previous halvings, the price of bitcoin was mixed in the first few months and wound up significantly higher one year later. But as investors well know, past performance is not an indicator of future results.
“I don’t know how significant we can say halving is just yet,” said Adam Morgan McCarthy, a research analyst at Kaiko. “The sample size of three (previous halvings) isn’t big enough to say ‘It’s going to go up 500% again,’ or something.”
At the time of the last halving in May 2020, for example, bitcoin’s price stood at around $8,602, according to CoinMarketCap — and climbed almost seven-fold to nearly $56,705 by May 2021. Bitcoin prices nearly quadrupled a year after July 2016’s halving and shot up by almost 80 times one year out from bitcoin’s first halving in November 2012. Experts like McCarthy stress that other bullish market conditions contributed to those returns.
Friday’s halving also arrives after a year of steep increases for bitcoin. As of Friday night, bitcoin’s price stood at $63,907 per CoinMarketCap. That’s down from the all-time-high of about $73,750 hit last month, but still double the asset’s price from a year ago.
Much of the credit for bitcoin’s recent rally is given to the early success of a new way to invest in the asset — spot bitcoin ETFs, which were only approved by U.S. regulators in January. A research report from crypto fund manager Bitwise found that these spot ETFs, short for exchange-traded funds, saw $12.1 billion in inflows during the first quarter.
Bitwise senior crypto research analyst Ryan Rasmussen said persistent or growing ETF demand, when paired with the “supply shock” resulting from the coming halving, could help propel bitcoin’s price further.
“We would expect the price of Bitcoin to have a strong performance over the next 12 months,” he said. Rasmussen notes that he’s seen some predict gains reaching as high as $400,000, but the more “consensus estimate” is closer to the $100,000-$175,000 range.
Other experts stress caution, pointing to the possibility the gains have already been realized.
In a Wednesday research note, JPMorgan analysts maintained that they don’t expect to see post-halving price increases because the event “has already been already priced in” — noting that the market is still in overbought conditions per their analysis of bitcoin futures.
WHAT ABOUT MINERS?
Miners, meanwhile, will be challenged with compensating for the reduction in rewards while also keeping operating costs down.
“Even if there’s a slight increase in bitcoin price, (halving) can really impact a miner’s ability to pay bills,” Andrew W. Balthazor, a Miami-based attorney who specializes in digital assets at Holland & Knight, said. “You can’t assume that bitcoin is just going to go to the moon. As your business model, you have to plan for extreme volatility.”
Better-prepared miners have likely laid the groundwork ahead of time, perhaps by increasing energy efficiency or raising new capital. But cracks may arise for less-efficient, struggling firms.
One likely outcome: Consolidation. That’s become increasingly common in the bitcoin mining industry, particularly following a major crypto crash in 2022.
In its recent research report, Bitwise found that total miner revenue slumped one month after each of the three previous halvings. But those figures had rebounded significantly after a full year — thanks to spikes in the price of bitcoin as well as larger miners expanding their operations.
Time will tell how mining companies fare following this latest halving. But Rasmussen is betting that big players will continue to expand and utilize the industry’s technology advances to make operations more efficient.
WHAT ABOUT THE ENVIRONMENT?
Pinpointing definitive data on the environmental impacts directly tied to bitcoin halving is still a bit of a question mark. But it’s no secret that crypto mining consumes a lot of energy overall — and operations relying on pollutive sources have drawn particular concern over the years.
Recent research published by the United Nations University and Earth’s Future journal found that the carbon footprint of 2020-2021 bitcoin mining across 76 nations was equivalent to emissions of burning 84 billion pounds of coal or running 190 natural gas-fired power plants. Coal satisfied the bulk of bitcoin’s electricity demands (45%), followed by natural gas (21%) and hydropower (16%).
Environmental impacts of bitcoin mining boil largely down to the energy source used. Industry analysts have maintained that pushes towards the use of more clean energy have increased in recent years, coinciding with rising calls for climate protections from regulators around the world.
Production pressures could result in miners looking to cut costs. Ahead of the latest halving, JPMorgan cautioned that some bitcoin mining firms may “look to diversify into low energy cost regions” to deploy inefficient mining rigs.
