In this roll and move game, 2 to 4 players roll a d6 then move their tokens around a triangular board in a clockwise fashion, attempting to land on strategically marked positions where they can draw cards from one of two card decks (Patient's Serum or Laboratory decks). The first player to acquire all 8 units of the different blood types (3 Group O; 3 Group A; 1 Group B and 1 Group AB) from the Blood Bank is the winner. The Patient's Serum card deck represents different antibodies and are trivia questions related to the antibody. Incorrect responses result in an immediate lost of a Blood Bank card showing a blood group. The Laboratory deck gives "play immediately" cards that either penalizes common errors in technique or rewards good technique. The Blood Bank card deck provide the blood units that the players require to win the game. Players who loss all their blood group cards are immediately eliminated from the game. Produced and sold by Ortho Diagnostics in 1978 as a learning tool for technicians in immunohematology. —user summary