What Do You Know About Your Blood Type?

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Question 1/7
There are this many major blood types:
- a
  
  2
- b
  
  4
- c
  
  6
Answer 1/7
There are this many major blood types:
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- Correct Answer:
They’re A, B, AB, and O. A tiny bit of protein, called an antigen, on the surface of a red blood cell determines what type you have. If you have the A antigen, you have blood type A; the B antigen gives you blood type B. If you have both A and B, you have blood type AB. If you have no antigens, you have blood type O.
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Question 1/7
The Rh factor is:
Answer 1/7
The Rh factor is:
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If you have this on your red blood cells, you have a positive blood type. If you don’t, you have a negative blood type. For example, if you have the A antigen and the Rh factor, your blood type is A positive. If you have the B antigen but no Rh factor, your blood type is B negative. A simple blood test can tell you which type you have.
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Question 1/7
People with this blood type have a lower risk of heart disease:
- a
  
  A
- b
  
  B
- c
  
  O
Answer 1/7
People with this blood type have a lower risk of heart disease:
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- Correct Answer:
Type O is the most common type: about 43% of Americans have it. On the flip side, if you have AB blood, you’re at higher risk compared to people with other blood types. That’s also the rarest type -- about 4% of people in the U.S. have it.
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Question 1/7
This blood type can be used by anyone:
Answer 1/7
This blood type can be used by anyone:
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Ideally, you should get your own blood type if you need a transfusion (when blood from one person is given to another). But in an emergency, O negative can be used by anyone with any blood type. That’s because it doesn’t have any of the antigens -- A, B, or Rh -- that can lead your immune system to attack it. About 7% of people in the U.S. have O negative blood.
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Question 1/7
People with this type can use blood from anyone else:
Answer 1/7
People with this type can use blood from anyone else:
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They’re known as “universal recipients” because their blood has all the antigens -- A, B, and Rh. If you have this type, your body will recognize any other blood type as its own.
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Question 1/7
You can lose weight easier if you base your diet on your blood type.
- a
  
  True
- b
  
  False
Answer 1/7
You can lose weight easier if you base your diet on your blood type.
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- Correct Answer:
You may have heard of this idea, but there’s no evidence to support it. No studies have shown any health effects of specific foods on any blood type.
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Question 1/7
This factor can cause problems during pregnancy:
- a
  
  Rh negative
- b
  
  Rh positive
Answer 1/7
This factor can cause problems during pregnancy:
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- Correct Answer:
A woman’s blood can attack their baby’s blood cells if they’re Rh negative and the baby is Rh positive. This is called rhesus disease, and medication can prevent it. If you’re pregnant, you should have a blood test to find out your Rh factor. If you’re Rh negative, your doctor will recommend that you take the medication to be safe.
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Sources | Reviewed by Melinda Ratini, MS, DO on August 12, 2020 Medically Reviewed on August 12, 2020

Reviewed by Melinda Ratini, MS, DO on
August 12, 2020

IMAGE PROVIDED BY:

1) Tetra Images / Getty Images

SOURCES:

American Heart Association: “Blood type may influence heart disease risk.”

Kidshealth.org: “Blood Types.”

LiveScience.com: “What’s the Most Common Blood Type?”

National Center for Biotechnolgy Information: “Blood type diets lack supporting evidence: a systematic review.”

NHS Choices: “Rhesus disease.”

Red Cross: “Learn About Blood Types.”

University of Vermont: “Alexander’s and Cushman’s Study Finds Blood Type and Memory Loss Link.”

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THIS TOOL DOES NOT PROVIDE MEDICAL ADVICE. It is intended for general informational purposes only and does not address individual circumstances. It is not a substitute for professional medical advice, diagnosis or treatment and should not be relied on to make decisions about your health. Never ignore professional medical advice in seeking treatment because of something you have read on the WebMD Site. If you think you may have a medical emergency, immediately call your doctor or dial 911.