Alfred Blalock (April 5, 1899 - September 15, 1964) was an American surgeon most noted for his work on the medical condition of shock as well as tetralogy of Fallot - commonly known as blue baby syndrome.

The Wikipedia page on the American Civil War provides a comprehensive overview of the war that took place in the United States between 1861 and 1865.

Autism spectrum disorder (ASD) is a neurodevelopmental disorder that affects brain development and impairs an individual's ability to communicate and interact with others.

Cancer is a broad term used to describe a group of diseases characterized by the uncontrolled growth and spread of abnormal cells in the body.

Cardiac surgery, or cardiovascular surgery, is surgery on the heart or great vessels performed by cardiac surgeons.

Cardiology is the branch of medicine that deals with the study, diagnosis, and treatment of disorders relating to the heart and the blood vessels.

Cardiopulmonary resuscitation (CPR) is a life-saving emergency procedure performed on individuals whose heart or breathing has stopped.

The Centers for Disease Control and Prevention (CDC) is a national public health agency in the United States.