Colin Savage says he nearly lost his life after he developed deep vein thrombosis after a 10-hour flight from Chile to Toronto

AstraZeneca has acknowledged that its Covid vaccine, Covishield, can cause a rare side effect called Thrombosis with Thrombocytopenia Syndrome (TTS), characterized by blood clot formation in unusual places like the brain or abdomen,...

The Sikh community in England has asked the country's coroner to look into the sudden death of a prominent campaigner for a separate Sikh state. Avtar Singh Khanda died just days before Canadian Hardeep Singh Nijjar was killed in British...

As misinformation about the safety of COVID-19 vaccines and potential side-effects continue to circulate, some doctors have made it a mission to use the facts in order to help people get vaccinated.

Canada's deputy chief public health officer says he expects to hear recommendations soon on whether it's safe and effective for Canadians to get an mRNA vaccine after receiving a first dose of AstraZeneca.

Some doctors are concerned about new guidance for the Johnson & Johnson COVID-19 vaccine after the National Advisory Committee on Immunization said it should be limited to those over 30 who don’t want to wait for an mRNA vaccine....

Infectious disease specialist puts AstraZeneca vaccine risks and benefits into context after Quebec woman's death.

A Centers for Disease Control panel says despite the rare risk of blood clots, the vaccine’s suspension should be lifted.

Leading vaccine expert Dr. Peter Hotez says this pause allows authorities to "fine-tune which groups" to potentially hold off on giving the vaccine, such as certain groups of women who are already at risk of blood clotting.

Infectious disease specialist Dr. Susy Hota answers questions about the risk of blood clots from the AstraZeneca-Oxford or Johnson & Johnson COVID-19 vaccines and how that risk compares to other medications.

US health authorities said they were investigating blood clots in six women in the days after vaccination.

Dr. Supriya Sharma talks about the risk of getting a blood clot from a vaccine or birth control.

Canada's vaccine advisory committee on Monday recommended suspending the use of the AstraZeneca-Oxford COVID-19 vaccine in Canadians under 55. Dr. Isaac Bogoch, a member of Ontario's COVID-19 task force and an infectious disease...

Canada’s vaccine advisory committee has changed its advice and now says the AstraZeneca COVID-19 vaccine should only be given to people aged 55 and up following concerns it could be linked to a rare blood clot.

A woman in Quebec, whose age was not released, was confirmed to have the serious clotting condition known as vaccine-induced prothrombotic immune thrombocytopenia, according to the province's Ministry of Health and Social Services.

Ian Hanomansing speaks to two people who were some the first in the world to get their COVID-19 shot. Tom Chivers and Kristen Choi explain why they chose to take part in clinical trials in London and Los Angeles almost a year ago, and...

Use of vaccine paused for 14 days in Denmark while investigators probe reports of possible ‘serious side-effects’.

The World Health Organization says there's no link between the AstraZeneca coronavirus vaccine and recent incidents of blood clots in immunized patients. Health Canada also stated there's 'no indication that the vaccine caused these...

Toronto emergency physician Dr. Nour Khatib says patients should not delay going to hospital emergency departments because of fear of COVID-19. 

To prevent a clot, doctors say people should take breaks every couple of hours to stretch their legs and wear compression socks to reduce swelling and improve blood flow. Doing calf exercises such as toe and heel lifts can also help.

Shown are red blood cells (erythrocytes, red), which transport oxygen, white blood cells (leucocytes, white), part of the immune system, and platelets (thrombocytes, yellow), which are active in blood coagulation (clotting)

Human factor VIII molecule, a human protein involved in the blood clotting process.

Animation showing contraction of blood vessels problem.

You can see a brain MRI scan. The patient had Deep Venous Sinus Thrombosis and the MR scan was took after treatment for checking.