For which of these reasons should first aid kits contain face shields?

Face shields in first aid kits are essential for protecting the rescuer against infectious diseases. When providing care, especially in situations that may involve mouth-to-mouth resuscitation or close contact with bodily fluids, the risk of transmission of infections is significant. Face shields serve as a barrier, helping to minimize the risk of exposure to pathogens that could be present in saliva, blood, or respiratory droplets from the victim.

In emergency scenarios, protecting the rescuer is crucial, as it not only ensures their safety but also maintains their ability to provide effective assistance. Utilizing a face shield can prevent potential health risks, allowing the rescuer to remain focused on the emergency without concern for their own health.

Other options, while relevant in different contexts, do not specifically address the primary purpose of a face shield in a first aid situation. For instance, improving the effectiveness of CPR relates more to techniques rather than equipment; shielding against debris pertains to protective equipment like goggles; and aiding vision in smoke concerns visibility rather than the essential barrier function that face shields provide against infectious exposure.