You will find four blood types: A, B, AB, or O. Also, blood is possibly Rh-favourable or Rh-destructive. So When you have kind A blood, It is either A positive or simply a negative. Which kind that you are is significant if you need a blood transfusion. As well https://bookmarkmiracle.com/story21626096/detailed-notes-on-blood-castle-mu-online