American Heart Association (AHA) is a nonprofit voluntary health agency funded by private contributions. They are dedicated to the reduction of death and disability from cardiovascular diseases like heart diseases and stroke. They are one of the world's largest voluntary health organizations with about 2,200 community organizations in all states, the District of Columbia, and Puerto Rico. More than 3.7 million people volunteer with the American Heart Association to fight cardiovascular diseases, the nation's No. 1 killer and a leading cause of disability. Preventing heart disease and stroke is the first priority of the American Heart Association. In support of this goal, they have contributed more than $1 billion to cardiovascular research since 1949. Public education programs to inform people on how to reduce their risk of heart disease and stroke is another priority. They also sponsors continuing medical education seminars and meetings throughout the year.