There are eight common blood types: A positive, A negative, B positive, B negative, O positive, O negative, AB positive and AB negative. But which is the rarest? Here's what to know. Start the day ...

Blood bags, sorted by type, line a tray at a hospital. Some blood types are more common than others. ER Productions Limited/Getty Images ...

If you've ever searched the internet for the rarest blood type, you may have come up with more questions than answers. The short answer: AB negative is the rarest of the eight main blood types. Less ...

In a development that “could significantly improve treatment for people with blood disorders and rare blood types”, small amounts of lab-grown red blood cells were tested to see how they ...