Blood type question

United States
February 28, 2009 1:09pm CST
What is the rarest blood type? I know the most common blood type is o positive. Can an O positive person donate to any blood type?
2 people like this
10 responses
@carolbee (16231)
• United States
28 Feb 09
The rarest blood type is ab Rh negative. I am o positive so I can donate to anyone needing blood. My blood type is the most common and is always in demand. One of our grandkids has a different blood type, can't remember what it is right now, but it's good to know I can donate if she should need blood.
3 people like this
@sandymay48 (2031)
• Canada
28 Feb 09
Hi moneymommy, maybe I can help a bit with this as I used to be in healthcare. The rarest form of blood is the kind that isnt available when you need it!!..I read that before and how true it is. I beleive in most countries, the rarest blood type is AB negative. And yes, type O is known as universal and contains properties that are compatible with all blood types.. I hope the next question is not where do I want the needle inserted??
@ElicBxn (61149)
• United States
28 Feb 09
O positive or O+ can donate to anyone with positive blood. O- is the universal donar - my sister is O-
3 people like this
@Lore2009 (7386)
• United States
28 Feb 09
O is the universal donor. It can donate to A, B, and AB. But it cannot receive from any of these. O needs to receive only from Os. ABs can receive from any one but they can't give to anyone. Os were the first blood types and then As developed and then Bs, and ABs are the newest and rarest.
2 people like this
@winterose (39897)
• Canada
28 Feb 09
yes that is the rarest but it is also called a universal donar because that blood type will mix with all the others.
2 people like this
• Malaysia
28 Feb 09
AB Rh negative ~ is the rarest blood type which only has 0.8% of the world population. Actually, the rarest blood type has its own definition ~ "The rarest blood type is the type that's not available when needed". For O+ blood can donate to anyone who is also Rh+ such as; A+ , B+, AB+ and other O+ . Like mine, I am for A+ type of blood so I can receive O+ blood. But O+ cannot donate to Rh negative blood. [Note: Rh is Rhesus factor]
@fasttalker (2797)
• United States
28 Feb 09
I have AB- blood type. I have always been told by Doctors that I have the rarest blood type. I do donate blood often but to be honest I get sick and tired of the Red Cross hounding me about it. I give to the Red Cross when they are somewhere close. One time I donated for a young girl that was working on a scholarship and she got credited so much toward her scholarship for each donor that gave. I thought it was a good thing so I not only gave I gave twice in order for her to receive credit. Ever since then they are constanly calling me and sending me letters in the mail telling me where they are and asking if they can set up an appointment. I never had a problem donating blood until they started hounding me about it and to be honest it makes me mad!
1 person likes this
• United States
28 Feb 09
Thanks for all your answers everyone has answered my question!
@vamp6x6x6x (1220)
• United States
11 Apr 09
They say the rarest is AB- I believe, but I think the rarest is the most common(O+) for it is always needed for the simple fact that it is what people call a universal blood type; meaning that it is compatible with just about any blood type.
• United States
1 Mar 09
Overall in the world, B is the rarest bloodtype only 16% have it. A person with type O-negative blood can safely donate to a person with any BO blood type and is called a "universal donor"
@melvill (392)
• Philippines
1 Mar 09
Hello moneymommy! The rarest blood type is AB, my mother's blood type also. I think type O blood type can donate to any blood type.