Final answer:
The Food and Drug Administration (FDA) regulates and approves the efficacy of products used for infection control.
Step-by-step explanation:
The agency that regulates and approves the efficacy of products used for infection control is the Food and Drug Administration (FDA).
The FDA is a federal agency responsible for ensuring the safety and effectiveness of human and veterinary drugs, biological products, medical devices, and more.
For example, the FDA issues rules and regulations for products like antibacterial soaps to ensure their safety and effectiveness in infection control.