HEALTH officials have urged people to stay vigilant for a Covid vaccine side effect which could signal a deeper problem. What causes the Covid vaccine headache?
Headaches which last for four days have emerged as a concerning sign for Covid vaccine recipients. The announcement to report such symptoms follows fears the AstraZeneca jab could cause blood clotting.
These headaches are a hallmark sign of Cerebral Venous Sinus Thrombosis (CVST), a clotting disorder.