what is the difference between negative and positive blood group?
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The blood groups being positive and negative is defined by the presence or absence of certain antigens on the surface of RBCs. If this surface has antigen then it is called as positive if the surface does not have antigen then it is called a negative blood group. The antigen present is known as RH antigen or rhesus .
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The red blood cells also have a protein that is called Rh on the surface of the cell. Your blood can be Rh positive, which means that you have the Rh protein, or Rh negative, which means that you do not have the Rh protein. The letter of your blood group plus the Rh makes your blood type.
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Answer From Rajiv K. Pruthi, M.B.B.S. For emergency transfusions, blood group type O negative blood is the variety of blood that has the lowest risk of causing serious reactions for most people who receive it. Because of this, it's sometimes called the universal blood donor type.
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However, when it comes to the Rh blood types, many of us do not fully understand what it means to be positive or negative. In the United States, approximately 85% of the population has an Rh-positive blood type, leaving only 15% with Rh negative.
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Positive or negative blood If you have the Rh D antigen, your blood type is positive. If you lack the Rh D antigen, your blood type is negative. 77% of our donors are Rh D positive. There are four other main antigens in the Rh system.
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AB negative is the rarest of the eight main blood types - just 1% of our donors have it. Despite being rare, demand for AB negative blood is low and we don't struggle to find donors with AB negative blood. However, some blood types are both rare and in demand.
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However, in the United States, AB-negative is considered to be the rarest blood type, and O-positive the most common. The Stanford School of Medicine Blood Center ranks blood types in the United States from rarest to most common as follows: AB-negative (.
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Blood group O has no antigens, but has both anti-A and anti-B antibodies in the plasma, as well as some special “anti-A,B” antibodies. Blood group AB has both A and B antigens, but no antibodies. ... Blood group A has A antigens on the red blood cells with anti-B antibodies in the plasma.
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People with AB type blood (positive or negative) are universal plasma donors. Only 4% of the population has type AB blood. Plasma from AB donors can be given to patients with any blood type, making it extremely important for those in need. AB donors are encouraged to donate Plasma or Platelets.
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For example, AB blood has both the A and B antigen, so a person with this type of blood can receive either type A or type B blood. ... When it comes to the Rh factor, people with Rh-positive blood can receive either Rh-positive or Rh-negative blood, while people with Rh-negative blood can only receive Rh-negative blood.
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Like A, B and O, the positive or negative component of a person's blood type refers to a molecule which is either present or absent on the surface of their red blood cells. In this case, it's an antigen in a blood group system called the Rh (originally called Rhesus) system.
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HIV negative means you have no signs of HIV in your blood; a positive HIV test means that you do have signs of HIV in your blood. 1﻿ You can be positive for HIV even if you don't have symptoms.
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The list below shows the percentage of donors with each blood type: O positive: 35% O negative: 13% A positive: 30%
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O negative red blood cells lack the A and B antigens (hence, group O) and also the Rh(D) antigen. Rh null blood lacks all the antigens in the Rh group, such as D, C, c, E, e and others. The Rh null red cells can still be positive for A or B antigens, the presence or absence determines their ABO blood type.
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The universal blood type is O negative (O-). Donors with type O- blood have the unique power to help anyone in need of a blood transfusion. Red blood cells from O- donors can be transfused to anyone, regardless of the person's blood type.
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The immune system forms antibodies against whichever ABO blood group antigens are not found on the individual's RBCs. Thus, a group A individual will have anti-B antibodies and a group B individual will have anti-A antibodies.
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In this method, both forward (cell), as well as reverse (serum) grouping is carried out. The forward grouping suggests the presence or absence of A and B antigens in RBCs, whereas reverse grouping indicates the presence or absences of anti-A and anti-B in serum.