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Hematologic Diseases
Question #22610
91 days ago
155

which blood group is common - #22610

Amara

I am feeling a bit confused about blood types, especially when it comes to which blood group is common. Last week, I went to donate blood for the first time, super nervous but excited, right? They asked me about my blood group, and I had no clue! Ended up just saying what I thought might be right. The nurse seemed nice but said something like "Oh, we really need more donors from a specific one." Which got me thinking... which blood group is common, anyway? My grandma always said she was A+, but my dad apparently has O− which I thought was rare?? I just didn’t want to sound dumb. I mean, do certain groups get called more often for donations or transfusions? Like, if a hospital’s running low, is there a particular blood group that runs out faster than others? Are there reasons for that? I found some stuff online that says O+ is like the most needed or common, but then I saw something else saying AB is rare! I’m just trying to understand, which blood group is common and why? Anyone with some clarity here would really help me out.

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Doctors' responses

The most common blood group globally is typically O+, and your findings are in line with what’s generally observed. In most populations, about 37% of people have O+ blood. It’s often in high demand for donations because it can be given to patients of any Rh-positive blood type (A+, B+, AB+), making it particularly useful in emergencies. Your dad’s blood type, O−, is actually less common but is known as the universal donor, meaning anyone can receive O− blood, regardless of their blood type. This makes it extremely valuable in critical situations.

As for A+, your grandma’s type, it’s pretty common too, making up about 30% of people in some populations, depending on the region. A+ is also in constant demand because it can be donated to other A+ and AB+ individuals. On the other hand, AB− and AB+ are indeed rare, with AB− being the rarest of the main types. AB+ is known as the universal recipient, meaning people with this blood type can receive any type of blood, but it doesn’t mean it’s needed more in donations, since it can only donate to AB+.

As for hospitals running low, it often depends on their usual patient demographics and needs. Generally, O+ and O− are in higher demand because of their wide compatibility. Blood banks always encourage donations of all types to ensure they can meet diverse patient needs. There’s no judgment if you didn’t know your blood type—many people discover it through donation or medical testing. Considering becoming a regular donor is a fantastic way to help, regardless of your type. Each type has its unique role in healthcare, and donations save lives across the board.

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