About
Recognized on October 13, World Thrombosis Day focuses attention on the often overlooked and misunderstood condition of thrombosis. The 2026 campaign puts women’s health across the lifespan in focus, raising awareness of blood clot risks and prevention at every stage of life.
Every year, people and organizations around the world come together through World Thrombosis Day to raise awareness, share knowledge and take action. From community events and patient stories to healthcare education and advocacy, this global movement is helping make thrombosis harder to overlook and easier to recognize.
Meet our campaign leadership
World Thrombosis Day is led by the International Society on Thrombosis and Haemostasis (ISTH) in collaboration with thousands of international and national professional health and medical organizations and health advocates. The campaign is guided by campaign leadership, including Chair James Douketis, M.D., and Vice Chair Kathleen Freson, Ph.D., who bring expertise in hematology, thrombosis and hemostasis, vascular and general internal medicine and public health.
Working Together to Save Lives
01
Highlight the burden of disease (thrombosis in general) and highlight the need for action, specifically underscoring the unrecognized threat and serious consequences (morbidity and mortality) related to venous thromboembolism (VTE) and atrial fibrillation (AFib).
02
Increase public awareness of the significance, risks, signs and symptoms of thrombosis, specifically VTE and AFib as an important cause of thromboembolic stroke.
03
Empower individuals to talk with their healthcare providers about their risk for thrombosis and appropriate prevention. Empower individuals to seek immediate medical attention if they have signs and symptoms.
04
Galvanize organizations in countries across the globe to conduct appropriate and aligned campaigns in their regions.
05
Advocate for “systems of care” to properly prevent, diagnose and treat VTE and AFib.
Martha Ramirez
Social Media Specialist
"As a blood clot survivor myself, my #WTDWhy is to make sure that all blood clot survivors feel informed, educated and know how strong and resilient they are!"
— Sam Nelson, Campaign Manager
