Asians and folks from the middle-eastern area have a higher incidence of type B, for example.
Some of the differences are because some blood group antigens are involved in certain diseases, malaria being a great example. The malarial parasite needs the Duffy antigens in order to get into the red cells, so there was evolutionary pressure favoring people who were lacking them.
O+. I haven’t been able to give blood for about a year and a half due to travel in malarial zones, though, so the Red Cross doesn’t seem to know of my existence. I can give again in March. (Unless I end up in more malarial zones before then.)
Me three. The last time we had a thread like this, there was a higher proportion of O- people than the actual population. Theory went, people who are O- know, because you donate once and you’re regularly phoned and reminded ever after. Most people go through their lives not thinking about their blood type.
Another in the O- camp. I used to donate frequently, but am no longer able to donate due to having developed (I guess? Given that I once donated without any notification of there being an issue) anticardiolipin antibodies, which also forced me onto a life-long warfarin regimen.
I believe I’m B+, but I haven’t officially been typed. We tested ourselves in a college biology class. Also, my mother knew her type as O+ because she had surgery and a transfusion once. My father’s army dog tags listed him as B, so I took that as confirmation that the biology class test was most likely correct.
The only reason I remember whether I’m positive or negative <bloodtype wise> is because my mom’s the opposite, and rather rare.
I’m the more common one.
O-, CMV -, the true universal donor, even for premmies. I donate a pint of blood eveything 2 months and have been for the past 25 years. It’s how I give back to society. You’re welcome.
