Your Resource for all Things Relating to Factor V Leiden

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July 29th - National Factor V Leiden Awareness Day

Your Resource for all things relating to Factor V Leiden. Together through knowledge and awareness we can reduce the risk and help improve and save lives.

The American Factor V Leiden Association is very excited to announce that going forward each year it has designated… July 29th National Factor V Leiden Awareness Day.  Most people have never heard of Factor V Leiden – even though it is the most common inherited risk factor for abnormal blood clotting in the United States.

We hope to change that in a big way!


One of the primary objectives of the American Factor V Leiden Association is to expand and increase public awareness and promote education about Factor V Leiden through all means available.


Please take a moment every July 29th to self-examine your risks for blood clots and consider the possibility that you could carry the Factor V Leiden genetic disorder.

A very simple blood test can determine if you have Factor V Leiden.


If you have Factor V Leiden, making a few life changes could save your life.


The American Factor V Leiden Association is dedicated to its mission to serve as a central resource to the general public and medical community, expand awareness, promote education, advocate for and support those affected, assist in establishing testing guidelines, strongly encourage additional research, and facilitate in the exchange of information relating to Factor V Leiden


The ultimate goal is to save lives that would be lost to blood clots related to Factor V Leiden.


Thank you for supporting our cause!

What ISTH Congresses Are All About

ISTH 2021 is the XXIX Congress of the International Society on Thrombosis and Haemostasis (ISTH), taking place in Philadelphia, U.S., July 17-21, 2021.


The current plan for this hybrid event will incorporate both in-person and interactive online components to accommodate worldwide attendees in this rapidly changing global health environment. The ISTH will continue to evaluate and monitor conditions to hold an in-person meeting with the health and safety of our attendees, staff, and vendors at the forefront of our planning. 


Registration is now open! Register now for best rates.


Come to an ISTH Congress to experience the latest science in thrombosis and hemostasis, interact with the global hematology experts and advance your knowledge and career.

World Thrombosis Day: An Award-Winning, Collaborative Global Movement

Recognized on 13 October, World Thrombosis Day (WTD) focuses attention on the often overlooked and misunderstood condition of thrombosis. With thousands of educational events in countries around the world, WTD and its partners place a global spotlight on thrombosis as an urgent and growing health problem. Open your eyes to thrombosis. 


Join the WTD campaign today.


The Date

WTD takes place every year on 13 October, the birthday of Rudolf Virchow who was a pioneer in the pathophysiology of thrombosis. A German physician, pathologist, biologist and anthropologist, Virchow developed the concept of “thrombosis” and advanced our understanding of this condition. To learn more, visit the Berlin Museum of Medical History, formerly the Rudolf Virchow’s Pathological Museum.

American Blood Clot Awareness Day

American Society of Hematology (ASH) 2021 Annual Meeting

2021 ASH Annual Meeting
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