questionswho knows their own blood type?

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O positive. The Army made sure I knew what my blood type was by making me write it in Sharpie on everything they gave me.

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Checking in here with A+.

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I do not know because I cut biology lab in college the day we were typing blood. If I had known what we were going to do that day, I would have gone! DOH!

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If you donate blood, you usually get a card a few weeks later telling you what your blood type is. That's how I found out my type (O-).

ThinkGeek also sells a kit that you can use to figure it out on your own (allegedly). http://www.thinkgeek.com/product/8f3d/?srp=2

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B+ here. Found out years ago when giving blood.

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I am A+, my wife is A-, and my two kids are A+ and A- respectively.

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Anyone taking a Biology class in HS or college usually does a blood typing exercise. It's pretty cool that everyone in my immediate family is A+

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I couldn't tell you if my life depended on it.

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O Negative: Universal Giver that receives too many calls from Red Cross to donate at locations on the other side of the state (Michigan). My parents are A- and B+, my siblings are A, B, and AB (? on +/-). So we have everything covered.

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O+, only known from donating blood years ago. I used to be such a good faithful donor and haven't done it in years. I think it's time to start doing it again...

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O+

It's odd, when I had opportunities to give blood regularly I always did. Instead of getting light-headed like everyone else, I usually felt better after giving blood. Maybe this is because high blood pressure runs in my family, but I was young and fairly thin at the time.

I hate needles, but I'd do just about anything for free cookies.

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O- CMV+ so universal donor, but not "baby blood" Lots of phone calls until I got disqualified for travel for 24 months.

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@jsoko: Same here. O- They'll call 2 days after I've already given trying to sign me up for the next drive. Sometimes I think they'd prefer to just hook me up permanantly keeping just enough blood in me to keep me alive and making more.....

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ABO are the most known types, but there are many other sub-types. Rh+/- for example is tested on pregnant women to make sure the developing baby and the mom will not have incompatible blood. Some of the sub-types can change, which is why every pint of blood ordered is cross- matched when it is ordered, The makes sure the blood or blood product is compatible with the patient and safe to use.

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A+ here. My mom didn't know my blood type and the Red Cross told me on my donor card. I changed schools a few times in HS and managed to completely miss blood typing in Biology class.

And the Red Cross harassed me too, until I told them that if they called me one more time, I wouldn't donate anymore. Now they send me notices of local drives in the mail... even though they've booted us for a year for getting a new tattoo.

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@omnichad: Hmm... so you feel normally pressured after donating? Does it shoot out of you like a fire hose?

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O+ for me and all of my immediate blood-related family. I have no idea what my adopted siblings blood types are though. I just donated on Valentine's Day for the first time in almost 1 1/2 years due to travel, lung (no diagnosis but cleared up), and weather issues. Our local blood drive is pretty much set up to be exactly every 8 weeks, so when I finish donating I sign up for my next appointment... cuts down on most of the calls to set up appointments.

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i didnt know i was O+ until just 2 years ago.

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Tried to give blood once. They stabbed by 7 times. 8 if you count the flu shot afterward. More blood came out of the flu shot puncture than any of the other 7. Needless to say, I don't even try anymore. And anytime I need to have blood drawn for Dr's visits. It's the same situation.

O+

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A-.

Donate blood, platelets, and plasma if you're eligible!

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A positive. Says so on my American Red Cross card. Given about a gallon in 5 years of eligibility, saving up to 24 lives. Aw yiss.

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O+

The only reason I know is from an old family photo album which has a little card from when I was born. I haven't actually seen the album in about a decade or more, but I still remember that card with my blood type for some reason... it was light blue.

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O+.

They think my blood is pretty tasty, too. Every time I've donated they call the next day, and the next, and the next..... I haven't donated in a while because of some anemia, but if I can get over this ear infection I need to do it again.

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B Pos. here, which is funny as i'm a bit of a pessimist...

red cross is constantly calling me as well, usually on the home land line, usually when i'm @ work. dad tells them every time to call after 5p, and reminds the call center worker that everyone in the house knows when the local blood drives are, B/C he's one of the volunteers that helps set them up and tear them down, as well as hang the signs all over town..

they still call 2-3 times a week around 2 in the afternoon...

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The O that can give to everyone. Whatever that is.

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O Positive here, if it wasn't for the Air Force I would have no idea though. I can give to anyone but pretty much screwed when it comes to receiving.

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O+. I've known for years. Learned when I went into the Air Force and it's been reinforced with giving blood.

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If you were ever in the military you know. It's on your dog tag

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Hubby and I are both A+...both of our children are O+.

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AB+ "Universal Recipient" - Needless to say, I don't get called to give blood.

Edit:
Just found this:
http://www.redcrossblood.org/learn-about-blood/blood-types
Turns out I am a universal plasma donor. Hmmm. Interesting.

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@mtm2: Wow there is a lot of O+ people here, but after looking it up it's not that suprising.

•O+ 38 percent of population
•A+ 34 percent of population
•B+ 9 percent of population
•O- 7 percent of population
•A- 6 percent of population
•AB+ 3 percent of population
•B- 2 percent of population
•AB- 1 percent of population

http://www.redcrossblood.org/learn-about-blood/blood-types

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My dog tag says B+.

I think the B is for...* Bushmills Whiskey*...as my blood is full of it!

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@lotsofgoats: I feel especially energetic afterward. I didn't feel an abnormal pressure beforehand. But yeah - it did come out pretty fast.

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@zapp brannigan: How about that - for once I'm actually in the top group!

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I've always wanted to know but have no idea. I don't weigh enough to donate blood, but I have a sister in the military so I assume she knows what hers is and we're probably the same then... right?

off to bug sister

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@thewronggrape: It all depends on your parents and your grandparents...
You receive one antigen from each parent or no antigen (A, B, or O). A and B are dominant so if you receive an A antigen from one parent and no antigen (O) from the other, you will be Type A.
My parents are A and B, yet I am an O type. This is because my parents both did not receive an antigen from one of their parents, think of them as being Type AO and BO (containing both an antigen gene and a non-antigen gene). I happened to receive the Os, non-antigen, from each.
My parents can produce any blood type as shown by my siblings being A, B, and AB. So the probability of having the same blood type as your sister is present, but not guaranteed.

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@thewronggrape: No, in fact. While blood type is inherited, there is only one parental mix that only yields one blood type: O and O.

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@embhorn: Sorry, but this is incorrect. If my mother was only carried A antigen genes and my father only carried A antigen genes. The only possibility is blood type A.
The same goes with type B and type O: Mother only B antigens, father only B antigens. B is the only possible blood type.
Now if one parent only contains A antigens and the other only B antigens, the only possible blood type for the child is AB.

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AB+ (universal recipient) checking in here. I'm happy to...

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I don't know if I've ever been fully tested (i.e. I do not know for sure), but both of my parents are A+, so that should imply that I am also A+, right?

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@embhorn: I know what it says, however it doesn't take into account the grandparents and assumes that the type A and B contain an O gene.

Think of it this way, a simple example... all four of your grand parents are type AB, but your mother is type A and your father is type B. You and your siblings can only be AB, because there isn't a non-antigen (type O) gene in your family.

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@sgrman05: No. You could be type A or type O.

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@sgrman05: Nope... You can be, A+, A-, O+, or O- depending on what your parents carry.

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@jsoko: Which still doesn't change the fact that the person I replying to was asking if her blood type matched her sister's because they had the same parents.