Blood Groups - Why do we have blood types?

[Desinishon]

B positive xD

that's my blood group and like a reminder for me for always be positive ^^

Why do 40% of Caucasians have type A blood, while only 27% of Asians do? Where do different blood types come from, and what do they do?

From Greenwell I learn to my displeasure that blood type A puts me at a higher risk of several types of cancer, such as some forms of pancreatic cancer and leukaemia. I'm also more prone to smallpox infections, heart disease and severe malaria. On the other hand, people with other blood types have to face increased risks of other disorders. People with type O, for example, are more likely to get ulcers and ruptured Achilles tendons.

https://www.bbc.com/future/story/20140715-why-do-we-have-blood-types

It is very detailed and good article about blood groups and its origin. If its peak your curiosity then check it out c:There is also a blood type personality theory.

So what do you guys think about this? What blood type you got?

 

[moon]

I actually don't remember what my blood type is. A something, I imagine, as that's iirc by far the most common for people of my ethnicity. It's not really a thing I think about. Could be useful to double check and keep in mind what type I do have though.