do you think a new blood type could be created?

Question: do you think a new blood type could be created?
- Keywords:
  blood type
Asked by tosinoxo to Kat, Andrew, Katie, Sadaf on 24 Jun 2013.
- Andrew Swale answered on 24 Jun 2013:
  
  We cannot definitively rule out that over time a new blood type could evolve
- anon answered on 26 Jun 2013:
  
  Well we currently have 4 major blood groups but theres subgroups of these groups, I do think with technological advances with stem cell research that blood will be artificially manufacture within laboratorues in the next 50 years, well see!

Question: do you think a new blood type could be created?