Final answer:
Peripheral platelet destruction can be caused by viruses, malignancies, drugs, or multiple blood transfusions. This can lead to abnormal clotting or excessive bleeding.
Step-by-step explanation:
Peripheral platelet destruction can be caused by multiple factors, including viruses, malignancies, drugs, and multiple blood transfusions. These factors can lead to either an inadequate or excessive production of platelets, resulting in abnormal clotting or excessive bleeding.