A rare but serious clotting disorder linked to certain COVID-19 vaccines and natural adenovirus infections has puzzled scientists for years. An international team of researchers from (Canada), ...

Rare but dangerous blood clotting associated with that vaccine as well as AstraZeneca’s had a genetic cause, according to a new paper.

The U.S. Food and Drug Administration authorized Johnson & Johnson’s Covid vaccine for emergency use in February 2021, nearly ...

Find out about the COVID-19 vaccines, the benefits of COVID-19 vaccination and the possible side effects.

Scientists say they have identified a mutated autoantibody gene as the mechanism behind rare but serious abnormal blood ...

Rare but deadly blood clots tied to J&J and AstraZeneca's vaccines were caused by an autoimmune reaction that some people are predisposed to, researchers found.

LIBERTYVILLE, Ill. -- Advocate Aurora Health, a health care system in Wisconsin and Illinois, said it has resumed COVID-19 vaccinations after temporarily pausing them to investigate "experienced ...

The U.S Centers for Disease Control and Prevention is issuing new allergy guidelines for the COVID-19 vaccine. The recommendations were published on the CDC's website Saturday, CNN reported. If you ...

WASHINGTON - It was anxiety — and not a problem with the shots — that caused fainting, dizziness and other short-term reactions in dozens of people at coronavirus vaccine clinics in five states, U.S.