The International Society on Thrombosis and Haemostasis (ISTH) launched World Thrombosis Day in 2014, observed annually on October 13, chosen to honor the birthday of German physician Rudolf Virchow, credited with describing the fundamental mechanisms of blood clot formation in the 19th century. The day raises public and medical awareness of thrombosis, which includes conditions such as deep vein thrombosis and pulmonary embolism, a leading cause of death and disability worldwide despite being preventable in many cases. It also highlights the importance of recognizing risk factors such as major surgery, prolonged immobility, and certain chronic health conditions. Hospitals and medical associations worldwide run awareness campaigns that include free screenings, medical lectures, and educational materials aimed at both at-risk patients and healthcare workers.