A health-care worker holds up a vial of the AstraZeneca Covishield vaccine at a COVID-19 vaccination clinic in Montreal, Thursday, March 18, 2021. THE CANADIAN PRESS/Paul Chiasson

A health-care worker holds up a vial of the AstraZeneca Covishield vaccine at a COVID-19 vaccination clinic in Montreal, Thursday, March 18, 2021. THE CANADIAN PRESS/Paul Chiasson

Canadian doctors say getting COVID-19 poses greater risk of blood clots than the vaccine

Clots occurred at a rate between 1 in 250,000 to in 500,000 people who received the vaccine

The national advocacy group for patients with blood-clot disorders says there is a greater risk of getting blood clots from COVID-19 than there is from the vaccine.

Thrombosis Canada issued an updated statement on the risk of blood clots late Thursday, after the European Medicines Agency released its final report on the risk of blood clots after getting the Oxford-AstraZeneca vaccine.

The agency says there is no evidence of increased risk of blood clots from the vaccine, but added there is still not enough evidence to say if the vaccine played a role in a small number of clots in the vein that drains blood from the brain.

Dr. Theresa Tam, Canada’s chief public health officer, said further analysis is ongoing in Canada and around the world.

“Overall, the benefits of the AstraZeneca COVID-19 vaccine and protecting Canadians from COVID-19 continue to outweigh the risks,” she said.

Thrombosis Canada, whose board is made up of physicians specializing in blood clots, says the incidence of those clots, known as cerebral sinus vein thrombosis, occurred at a rate between one in 250,000 and one in 500,000 people who received the vaccine.

By comparison, they say blood clots occurred in about one in 20 people hospitalized with COVID-19 and about one in 100 patients who have COVID-19 but were not hospitalized.

Dr. James Douketis, president of Thrombosis Canada and a blood clot specialist at St. Joseph’s Healthcare in Hamilton, said it can be hard to reconcile the risk of a serious complication like a blood clot but he said it is an extremely rare reaction.

Douketis said this isn’t just any drug on the market either.

“We’re dealing with a vaccine in the middle of a pandemic that can help potentially millions and millions of people, in many ways, not least of which is preventing blood clots related to COVID,” he said.

At least four European countries that halted AstraZeneca injections pending the review are resuming them, with France, Germany and Italy restarting the vaccinations today and Spain planning to do so next week.

French Prime Minister Jean Castex rolled up his arm to get his dose of AstraZeneca in front of the cameras Friday to try and restore confidence in the vaccine.

British Prime Minister Boris Johnson did the same.

“The Oxford jab is safe, and the Pfizer jab is safe,” Johnson said Thursday before getting his injection. “The thing that isn’t safe is catching COVID, which is why it is so important that we all get our jabs as soon as our turn comes.”

Johnson was infected with COVID-19 last year and spent several days in intensive care last April.

Canada has only received about 500,000 doses of AstraZeneca so far, but anticipates getting 1.5 million more from the United States before the end of the month. Canada is to receive almost 24 million doses of AstraZeneca through different channels, including 20 million directly from the company made at a Maryland production facility, two million from the Serum Institute of India, and another 1.9 million from the global vaccine sharing initiative known as COVAX.

More than three million Canadians have now received at least one dose of vaccine, or about eight per cent of the population. There are to be enough doses delivered to get every adult one dose by the end of June, and a second dose by the end of September.

Most Canadian provinces are spacing out the second dose by up to four months to try and get more people one dose quicker.

Data released by Public Health England show in people over the age of 70, a single dose of either Pfizer or AstraZeneca had cut the risk of getting symptomatic COVID-19 infections by 60 per cent. In people over 80, the vaccines reduced hospitalization due to COVID-19 by 80 per cent and death by 85 per cent.

Get local stories you won't find anywhere else right to your inbox.
Sign up here

Just Posted

Spray paint was discovered at Hot Rocks. (Special to The News)
Popular Maple Ridge summer destination vandalized

Rocks discovered with spray paint along South Alouette

Police shut down 240 Street after a single vehicle accident. (The News files)
Maple Ridge man dies following crash

Police believe he went into medical distress before accident

An early morning fire forced the evacuation of a Maple Ridge apartment building on Saturday, April 3 (Deborah Hampton/Special to The News)
City of Maple Ridge thanks volunteers for response to Easter weekend blaze

Emergency Support Services volunteers stepped up to help displaced residents

A partial image from the painting Kanaka Creek by Eric Hotz, which in the exhibit at the Pitt Meadows Art Gallery.
A Study of Nature exhibition opens at Pitt Meadows Art Gallery

Eric Hotz paintings feature familiar scenes from across the Lower Mainland

Burnaby MLA Raj Chouhan presides as Speaker of the B.C. legislature, which opened it spring session April 12 with a speech from the throne. THE CANADIAN PRESS
B.C. NDP promises more health care spending, business support in 2021 budget

John Horgan government to ‘carefully return to balanced budgets’

A youth was arrested following a car crash on Wallace Street on Saturday, April 10. (Karl Yu/News Bulletin)
Onlookers laugh and jeer as B.C. teen beaten, then forced to strip and walk home

Police arrest older teen, call video shared on social media ‘disturbing’

Surrey RCMP are seeking the public's help to locate three puppies stolen from a South Surrey home on April 10. (Surrey RCMP photos)
Puppies stolen during weekend break-and-enter in South Surrey

Surrey RCMP seeking public’s assistance in locating three American Bulldog puppies

A lady wears a sticker given out after receiving a COVID-19 vaccine at a clinic in Richmond, B.C., Saturday, April 10, 2021. THE CANADIAN PRESS
B.C.’s COVID-19 case count slows after last week’s peak

3,219 new cases since Friday, 18 additional deaths

Cannabis bought in British Columbia (Ashley Wadhwani/Black Press Media)
Is it time to start thinking about greener ways to package cannabis?

Packaging suppliers are still figuring eco-friendly and affordable packaging options that fit the mandates of Cannabis Regulations

North Cowichan councillor Tek Manhas did not violate the municipality’s code of conduct by posting a sexist meme on Facebook, council concludes. (File photo)
B.C. municipality to take no action against councillor who posted sexist meme

Tek Manhas’s meme doesn’t violate North Cowichan council’s code of conduct, municipality concludes

Guinevere, lovingly referred to by Jackee Sullivan and her family as Gwenny, is in need of a gynecological surgery. The family is raising money to help offset the cost of the procedure. (Jackee Sullivan/Special to Langley Advance Times)
Langley lizard’s owners raise funds for gynecological surgery

The young reptile is scheduled for operation on Tuesday

—Image: contributed
Indoor wine tastings still allowed in B.C., not considered a ‘social gathering’

“Tasting is really just part of the retail experience. The analogy I use is you wouldn’t buy a pair of pants without trying them on.”

Mounties say they “corralled” four Ford Mustangs April 4 after an officer saw the muscle cars racing down 184 Street near 53 Avenue at about 10 p.m. (File Photo)
Mounties impound four Mustangs

Surrey RCMP say they seized four cars for street racing

Most Read