have you ever found a blood type that is not a b or o? if so how many people could have it?

Question: have you ever found a blood type that is not a b or o? if so how many people could have it?
- Keywords:
  blood type
Asked by RachelBR to Karen on 11 Nov 2016.
- Karen answered on 11 Nov 2016:
  
  I have never come across it but there is one blood group that is neither A B or O, it’s called Bombay group and it’s extremely rare. Only 0.0004% of the population have it. That’s 4 people / million. Having said that I don’t think there are any people in Ireland with it.

Question: have you ever found a blood type that is not a b or o? if so how many people could have it?