Ad blocker interference detected!
Wikia is a free-to-use site that makes money from advertising. We have a modified experience for viewers using ad blockers
Wikia is not accessible if you’ve made further modifications. Remove the custom ad blocker rule(s) and the page will load as expected.
Blood type designations commonly use two systems for determing blood transfusions: the AB designation and the Rh factor designation. There are four AB types and two RH types, yielding eight types: O+, A+, B+, AB+, O-, A-, B-, AB-. O is another type of designation which is given to blood which doesn't possess any A or B antigens.