Final answer:
Individuals with Rh+ blood can receive both Rh+ and Rh- blood, while individuals with Rh- blood can only safely receive Rh- blood to prevent immune reactions.
Step-by-step explanation:
The Rh factor is vital in blood transfusions due to its role in blood compatibility. Individuals with Rh-positive (Rh+) blood can safely receive Rh+ blood, as they naturally have the Rh antigen present in their erythrocytes. However, they are also typically able to receive Rh-negative (Rh-) blood because the absence of the antigen in the donor blood does not provoke an immune response. On the other hand, individuals with Rh-negative (Rh-) blood can only receive Rh- blood. If they are given Rh+ blood, their immune system may react against the Rh antigen, leading to potentially serious complications. This compatibility is key to preventing hemolytic reactions during blood transfusions.