Your blood type might seem like a minor detail in your medical history, but it carries significant implications for your health and medical care. From emergency transfusions to pregnancy planning, ...

Scientists are working to grow the rarest blood type in the world in a lab, an effort that could have huge ramifications for medicine. The blood type in question, Rh null, is found in just 50 people ...

Different people have different types of blood running through their veins. Humans have four main blood groups: A, B, AB and O. These are defined by which antigens are present on the surface of red ...

The rhesus factor, or Rh factor, is a protein that may be present on the surface of red blood cells (RBCs). If RBCs contain the Rh antigen, they are Rh-positive, and if not, they are Rh-negative. It ...

There are many known risk factors for COVID-19 — chief among them age and immunocompromised status. Now, it turns out that one’s blood type may play a role in the severity of one’s COVID-19 symptoms, ...