Final answer:
OSHA's trenching and shoring regulation does not cover the prevention of exposure to infectious diseases. It focuses on a range of other safety measures including fall protection, cave-in prevention, and confined space safety.
Step-by-step explanation:
The topic not discussed in OSHA's trenching and shoring regulation is the prevention of exposure to some infectious diseases. OSHA's regulations focus on a variety of safety measures for construction, general industry, maritime, and agriculture. These measures include providing fall protection, preventing trenching cave-ins, ensuring the safety of workers in confined spaces, preventing exposure to harmful chemicals, guarding dangerous machines, providing respirators or other safety equipment, and offering training for dangerous jobs in understandable language and vocabulary. Additionally, employers must adhere to the General Duty Clause of the OSH Act, which addresses keeping workplaces free from serious recognized hazards.