My blood type is …O,Ro S-,K:-1,Fy(a-),Fy(b-),Jk(b-). How rare is this blood type?

How many matches are there out there?

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Answer:
O is the most common blood type. I believe Ro…you are trying to say Rh neg. O neg is less common than O pos but still not rare. As far as the other blood groups listed…S, K, Fy, Jk…I am confused if you are talking about antigens or antibodies. Usually labs do not just automatically type these antigens, so I am confused why they would tell you that.

If you are saying that you are negative for these antigens…this is saying that it would be possible for you to develope an antibody over time with transfusions.

There are different percentages with these antigens. Is that S or s..K or k. Both exist.

I would need some more information to help you. Feel free to email me!

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Answer:
Well O type is the most common among all blood types, plus any person who needs blood regardless of their blood type can get O type.