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WikiCards · Card list · Science cards · ABO blood group system
Uncommon card · Science
ABO blood group system, an Uncommon card
The ABO blood group system is used to denote the presence of one, both, or neither of the A and B antigens on erythrocytes.
- Rarity
- Uncommon
- Domain
- Science
- ATK
- 78
- DEF
- 85
- Power
- 163
- Wikipedia reads a year
- 120,000
Power 163 (ATK + DEF): stronger than 85 % of WikiCards cards.
ABO blood group system quiz: 3 questions
Three questions on the ABO blood group system card, the way WikiCards duels ask them. Pick an answer, the facts are just below.
Find the missing word
Such ______ are rare in modern medicine.
Answer
mismatches. Such mismatches are rare in modern medicine. From the ABO blood group system article on Wikipedia.
Which of these cards hits hardest (highest ATK)?
Answer
Constantin Brâncuși. Constantin Brâncuși 87 · Loudspeaker 84 · Plastic surgery 81 · ABO blood group system 78 ATK in WikiCards.
In a duel, each round asks a question like these about the opposing card, with 15 seconds to answer.
The facts on the card
The card carries these facts from its Wikipedia article.
- For human blood transfusions, it is the most important of the 48 different blood type classification systems currently recognized by the International Society of Blood Transfusions as of June 2025.
- A mismatch in this serotype can cause a potentially fatal adverse reaction after a transfusion, or an unwanted immune response to an organ transplant.
- Such mismatches are rare in modern medicine.
Why it is Uncommon
Rarity in WikiCards follows a year of Wikipedia page views: the most read articles become Epic and Legendary cards. The ABO blood group system article was read about 120,000 times in a year. ATK comes from the length of the article and DEF from its quality, so this card hits with 78 and blocks with 85: each hit it takes is cut by 34 %.
How to get ABO blood group system
Open packs. Each pack holds five cards drawn from real Wikipedia articles, the rarest last, and the fifth card is always Rare or better. The odds are shown in the game. A free pack arrives every hour and two can wait, and the Coins you win in duels buy more packs.
More Science cards
Cards close in power
The cards just above and just below ABO blood group system in the power ranking, all domains together.
- Kazakh KhanateUncommon · History · ATK 81 DEF 82
- Tertiary educationUncommon · Society · ATK 80 DEF 83
- TibetansUncommon · Society · ATK 77 DEF 86
- Constantin BrâncușiUncommon · Arts · ATK 87 DEF 76
- LoudspeakerUncommon · Science · ATK 84 DEF 79
- LudhianaUncommon · Society · ATK 80 DEF 83
Card lists
- Wikipedia quizNew questions every day
- All cards from A to ZEvery card, by name
- Science cards
- Legendary cards
- Tier listS and A tiers by power (ATK + DEF)
Credits
Text : Wikipedia, ABO blood group system (revision), CC BY-SA 4.0. Photo : InvictaHOG, Public domain, Wikimedia Commons.
