A+ is the second most-common blood type in the world, just after O+, like mine. As far as limits go, you ended up with a relatively good one, mate. About 1-in-3 people have A+. Negative blood types are far more rare. All together, negative variants make up... 15% of the human population on Earth, if that.
But to answer your question, no. This isn't something that can be changed. It's genetic and came to you through your parents.
no subject
But to answer your question, no. This isn't something that can be changed. It's genetic and came to you through your parents.