landsteiner n wiener discovered rh factor in 1940..........
Sorry I dont know but by any chance are you in Tanglin Trust School Year 10?
There are several different ways of 'grouping' blood. One system has blood groups A, B, AB and O. Another system is the rhesus grouping where a blood is classified as rhesus-positive or -negative; D and Rh are the same group. It is a combination of these 2 classificatons which is used most commonly. These are the most commonly known groups, but there are 28 additional systems that are recognised around the world.
RH negative is not very rare, and it is a blood grouping system not a type. Whether your blood is Rh or not depends on the D-antigen in your blood. Rh is the second most important blood grouping system after ABO.
If red blood cells lack Rh antigens, the blood is called Rh-negative.
The person with Rh- blood will begin to make antibodies against Rh+ upon exposure. This may not occur with the first transfusion - but it is still not recommended to give an Rh- person Rh+ blood.
Rh is an antigen. If you have the antigen, your blood type is A+, B+, AB+, or O+. If you don't have the antigen, your blood type is A-, B-, AB-, or O-. People WITH the Rh antigen, can receive from/give to people with Rh+ or Rh-. People WITHOUT the Rh antigen, can ONLY receive from/give to people with Rh- blood. (meaning people without the antigen) If Rh- and Rh+ blood comes in contact, the Rh- will produce antibodies towards Rh+, and at the second contact with the blood, will cause agglutination.
You would give them A Rh Negative blood or you could also give them O Rh Negative as well. Group O is the universal donor so it can be given to anyone. If the patient is Rh Negative, they can only receive Rh Negative blood. If the patient was Rh positive, they can receive Rh positive or Rh negative.
Rh blood is the most complex genetically of all blood types. It is known that a mother who is pregnant and has Rh- and the father has Rh+, it can cause birth defects in the child. If you are recieving a blood transfusion though this does not apply. You can either recieve Rh- or Rh+. All blood types negative or positive all have Rh blood types in them. The problem you may be experiencing which may take you awhile to recieve blood is that you may have Rh- negative blood which means that you cannot recieve Rh-negative or Rh+negative, and you can only recieve Rh- negative, but yes all blood banks will carry Rh blood, this type of blood though may be more common in different types of people though.
RH- and RH+ are not blood types, they are factors.
Whether you have Rh Negative blood or Rh Positive blood has nothing to do with getting a TB test. TB testing should be done at least once a year which will show whether or not you have been exposed to Tuberculosis.
Rh factor or rehsus factor is also involved in blood groups. either a person is Rh+ or Rh- if u are A+ then u have blood group A and you are Rh+ if you are A- then you have blood group A and you are Rh-
Rh negative blood is rare in the human population because it is a genetic trait that is not as common as Rh positive blood. The Rh factor is inherited from our parents, and the gene for Rh negative blood is less prevalent in the general population. This makes Rh negative blood less common compared to Rh positive blood.