Final answer:
Weak D recipients are typically typed as Rh positive due to the presence of a variant D antigen on their red blood cells, though this may vary depending on transfusion facility policies.
Step-by-step explanation:
Weak D recipients are generally typed as Rh positive, as they have a variant form of the D antigen present on their red blood cells. However, the classification can vary depending on the policy of the transfusion facility, and some may classify them differently based on specific criteria or local protocols. Typically, in transfusion medicine, weak D individuals do not form anti-D antibodies and can safely receive Rh positive blood, which is why they are often typed as Rh positive. However, some facilities may choose to type them as Rh negative to avoid the risk of sensitization, especially in women of childbearing age who may become pregnant and risk sensitization that could affect future pregnancies.