There are actually 4 blood styles: A, B, AB, or O. Also, blood is both Rh-constructive or Rh-detrimental. So Should you have style A blood, It can be possibly A beneficial or maybe a adverse. Which type you are is essential if you want a blood transfusion. And also https://webnowmedia.com/story5345281/the-smart-trick-of-blood-castle-mu-online-that-nobody-is-discussing