Final answer:
Blood products are tested for their compatibility and to prevent disease transmission. HIV/AIDS is the most common disease transmitted through blood products.
Step-by-step explanation:
For what diseases are blood products tested?
When units of blood are being considered for transfusion, pretransfusion blood testing must be performed. Commercially prepared antibodies against the A, B, and Rh antigens are mixed with red blood cells to confirm the blood type.
What is the most commonly transmitted disease through blood products?
The most common disease transmitted through blood products is HIV/AIDS. Although the risk of acquiring HIV from a blood transfusion is now virtually nil in rich nations due to careful screening of blood donors and products, screening is less rigorous in poor nations.