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1. Blood group O positive
(O+) or O negative (O-):
What are the differences?

2. Summary
Blood group
O is well known to everyone. It's no coincidence that O-negative
(O-) people are called "universal donors." What does that mean?
What about O-positive (O+) people?Answers from Dr. Pascale
Richard, Medical Director of the French Blood Establishment
(EFS).
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4. As a reminder: Which blood groups are there?
Our blood is made up of 45 μl (red blood cells, white blood cells and
platelets) and 55% plasma (the liquid part of blood). However, the
antigens found on our blood groups vary from person to person, as do some
proteins that may or may not be present in plasma.
According to the ABO system, discovered in 1900 by the American
biologist and physician Karl Landsteiner, there are four basic blood
groups: blood group A, blood group B, blood group AB and blood
group O.By combining this system with the Rhesus system, which
determines the presence or absence of another antigen in the blood,
eight different blood groups are obtained:

6. • I blood group O positive (O+). Blood group
O+ or O-: What are the differences? Who to donate blood to?
Blood Group Peculiarities Positive? Who can receive O+ blood?
The red blood cells of O+ people are not coated with an antigen on their surface.
Therefore, the blood of O+ people can be transfused into all positive blood groups (A+,
B+, AB+, O+).
O+ red blood cells can only be transfused to Rhesus positive individuals (A+, B+, AB+,
O+). Blood group O
contains anti-An and anti-B antibodies. As such, they can only obtain blood from O+
or O humans.Otherwise, their antibodies attack red blood cells of blood groups A, B,
and AB, this is called hemolysis.

8. Peculiarities of blood group 0-negative? Who can receive O-Blood?
Like O+ people, O people do not have antigens on the surface of their red blood
cells. Your red blood cells can then be transfused into any blood group, regardless
of rh (A+, A-, B+, B-, AB+, AB-, O+, O-).
O-people, on the other hand, can only receive Rhesus negative blood (O-)
Which blood group is the universal donor?
Only O-negative (O-) individuals are considered “universal donors”. In other
words, you can donate anyone else's blood (A+, A-, B+, B-, AB+, AB-, O+, O-)
because their red blood cells don't contain the antigen.
O+ or O-: Which blood type is better?

9. Like O+ people, O- people have no antigens on the surface of their red blood cells
Their red blood cells can therefore be transfused to any blood group regardless of
rhesus (A+, A-, B+, B-, AB+, AB-, O+, O-).
In contrast, O- people can only receive rhesus negative (O-) O blood.
Which blood group is a universal donor?
Only people in the O negative (O-) group are considered "universal donors". In other
words, they can donate their blood from any other person (A+, A-, B+, B-, AB+, AB-, O+,
O-), because their red blood cells carry no antigen.
O+ or O-: which is the best blood group?
"There is no good or bad, no better or worse blood group, insists Dr. Richard. It is the
chance of genetics that does its work and there is no bad lottery”. Blood group O does
not have any particular advantages over blood groups A, B or AB.
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