Medically reviewed by Christopher Lee, MD Key Takeaways Research shows that people with type B blood may have a higher risk ...

Our genetic characteristics can range from our eye color to, in the case of men, being born with a recessive allele which means we get to keep our hair for much longer than those without it. Genetics ...

Thrombosis occurs when a clot blocks the flow of blood. There are two main types: arterial and venous. Arterial thrombosis develops in an artery. It’s typically caused by atherosclerosis (plaque ...

Across life on Earth, blood comes in blue, green, purple, even clear. But why? And what makes your blood different from mine? This is the strange world of blood—what it does, why it varies, and why we ...

Noncancerous blood disorders are conditions that affect blood cells, such as red blood cells, white blood cells, and platelets. Blood disorders may cause symptoms and complications, but most are ...

The American Red Cross says donors of all blood types, especially those with type O blood, are needed to keep the blood ...

It is possible for blood type to change, and in some cases, this can happen without a blood transfusion. When someone is born, their blood type is determined, so everyone should know what their blood ...