You can find 4 blood forms: A, B, AB, or O. Also, blood is either Rh-beneficial or Rh-damaging. So In case you have style A blood, It is either A positive or even a negative. Which type you might be is important if you need a blood transfusion. Plus https://exactlybookmarks.com/story19878530/the-5-second-trick-for-blood-castle-mu-online