There are 4 blood types: A, B, AB, or O. Also, blood is either Rh-favourable or Rh-negative. So For those who have type A blood, It really is either A good or perhaps a unfavorable. Which type that you are is very important if you want a blood transfusion. https://iwanttobookmark.com/story20047380/blood-castle-mu-online-things-to-know-before-you-buy