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

Fire crews battle a large wildfire north of Highway 1 east of the Yale Road West exit on Thursday, April 15, 2021. (Jenna Hauck/ Chilliwack Progress)
VIDEO: Firefighters battle wildfire in Chilliwack near Hwy 1

Helicopter dropping water on large wildfire in Chilliwack near Yale Road West exit, north of highway

web
Fire breaks out inside Mission Walmart

Customers, staff evacuated as firefighters investigate

Japanese Canadian citizens being transferred into waiting trucks outside Hope Station House. NNMCC L2021-2-1-004. Photographs courtesy of the Nikkei National Museum and Cultural Centre
Fight continues for historic Hope Station House

Ombudsman report and stop work order come alongside district’s move to remove heritage status

Lift equipment is driven away from a fire in an adjacent unit on Industrial Way in Chilliwack on Wednesday, April 14, 2021. (Paul Henderson/ Chilliwack Progress)
Chilliwack firefighters deal with heavy smoke, extreme heat in challenging industrial fire

Crews successful in containing fire to 1 unit in industrial building, adjacent units suffer smoke damage

A woman wears a protective face covering to help prevent the spread of COVID-19 as she walks past the emergency entrance of Vancouver General Hospital in Vancouver, B.C., Friday, April 9, 2021. COVID-19 cases have been on a steady increase in the province of British Columbia over the past week. THE CANADIAN PRESS/Jonathan Hayward
Top doctor warns B.C.’s daily cases could reach 3,000 as COVID hospitalizations surge

There are more than 400 people in hospital, with 125 of them in ICU

The father of Aaliyah Rosa planted a tree and laid a plaque in her memory in 2018. (Langley Advance Times files)
Final witness will extend Langley child murder trial into May or June

Lengthy trial began last autumn with COVID and other factors forcing it to take longer than expected

The corner of 96th Avenue and Glover Road in Fort Langley now has traffic signals, and new “touchless” signal activation buttons. (Matthew Claxton/Langley Advance Times)
Busy Fort Langley intersection gets ‘touchless’ crosswalk signals

The new traffic light started operation in April

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

A crossing guard stops traffic as students wearing face masks to curb the spread of COVID-19 arrive at Ecole Woodward Hill Elementary School, in Surrey, B.C., on Tuesday, February 23, 2021. A number of schools in the Fraser Health region, including Woodward Hill, have reported cases of the B.1.7.7 COVID-19 variant first detected in the U.K. THE CANADIAN PRESS/Darryl Dyck
COVID-infected students in Lower Mainland schools transmitting to 1 to 2 others: data

Eight to 13 per cent of COVID cases among students in the Lower Mainland were acquired in schools, B.C. says

Dr. Bonnie Henry – in a B.C. health order that went into effect April 12 – granted WorkSafe inspectors the power to enforce workplace closures with COVID-19 spread. THE CANADIAN PRESS/Jonathan Hayward
24 workplace closures being enforced in Fraser Health under new COVID-19 order

WorkSafe inspectors the power to enforce closures if COVID-19 has spread to 3 or more employees

Maple Ridge Fire and Rescue were conducting training operations at Gold Creek Falls when a firefighter broke their leg. (Eileen Robinson photo - Special to The News)
Firefighter suffers broken leg during swift water rescue practice in Golden Ears park

A training exercise at Maple Ridge waterfall on Wedesday results in mishap

Norm Scott, president of Royal Canadian Legion Branch # 91, is disappointed the Legion does not qualify for COVID financial assistance from the provincial government. (Black Press Media file photo)
B.C.’s pandemic aid package passing Legion branches by

Federal non-profit status stymies provincial assistance eligibility

Most Read