Is RH Yang Type A a rare blood type? 5

Negative type A, rare.

Although the rarest is negative AB

Rh-negative blood type accounts for about 10% of the Han and most ethnic groups in China, and about 10% of individual ethnic minorities.

Any RH antigen (also known as D antigen) on the red blood cells of the human body is called RH negative. As a result, the four main blood types of red blood cells A, B, O, and AB have been found to be divided into two types: Rh-positive and negative. According to relevant information, the Rh-positive blood type accounts for about 90% of the Han and most ethnic groups in China, and about 90% of individual ethnic minorities.

In some ethnic groups abroad, about 85% of people with Rh-positive blood type are present, and about 15% of them are Rh-negative people in Europe and the United States.

If you want to have two children when you get married, it is best to find someone with a negative blood type, otherwise it seems that it will be dangerous, and the first child is fine. (The specifics of Introduction to Medicine forgot .......)）

No, RH is a blood type system, Chinese, especially the Han 90% are positive, very few negative, if memory is less than 5%, ABO is a blood type system, divided into a b ab o four blood types, of which AB type is the least, so the Rh negative AB blood type people are the least, Chinese less than 1%

This one you're talking about isn't rare.

Most people are Rh-positive, and Rh-negative is rare.

Blood type A, positive for RH.

1909, Landsteiner: Human blood looks the same, but when each person is cut or otherwise injured, the blood has different symptom characteristics, and he called these different symptoms blood types. He developed a way to classify blood types into three types, known now as blood types A, B, and O (which were first discovered).

A few years later, two other scientists discovered the fourth major blood type in humans, type AB.

Between 1930 and 1940, Carl Landsteiner and Alex Vienna, Philip Levine, and Stetson discovered that macaque factor (also known as rh factor) was the "culprit" behind most of these transfusion reactions.

Rh factor is a protein substance found in red blood cells that is possessed by 85% of people (these people are called Rh-positive, denoted by a "+" after blood type); Another 15% are deficient in this substance (these people are called rh-negative, denoted by a "-" after the blood type).

Positive blood is the more common Rh-negative blood, and it is a rare type of panda blood. The blood type is often known as the ABO blood type, including type O, type A, type B and AB, and there is another blood type that is not commonly used is the RH blood type.

Then more than 90% of human beings belong to Rh-positive blood, mainly Rh blood group in which red blood cells contain D antigen is Rh positive, otherwise it is Rh negative, Rh blood group does not have some natural antibodies, antibodies are mostly formed by blood transfusion or pregnancy immunity, which has important clinical significance.

Once Rh-negative blood comes into contact with Rh-positive blood, a serious transfusion reaction may occur. Therefore, for the mother of Rh-negative blood, if it is said that the fetus is pregnant but positive, it is likely that neonatal hemolysis will occur, and for this positive blood is the more common Rh-negative blood, which is a rare type of panda blood.