What characteristic of a person can make them more vulnerable to infections?

Individuals with broken skin are indeed more vulnerable to infections because the skin serves as a primary barrier against pathogens. When the skin is compromised—due to cuts, abrasions, or other injuries—this protective barrier is disrupted, allowing bacteria, viruses, and other infectious agents easier access into the body. The skin's intactness is crucial for preventing pathogens from entering and causing infections. The presence of broken skin is a significant risk factor for various types of infections, including localized infections, such as cellulitis, and systemic infections if pathogens enter the bloodstream.

In contrast, frequent exercise, good sleep patterns, and a healthy diet contribute positively to a person's immune system and overall health, helping to reduce vulnerability to infections. These factors enhance the body's ability to respond to infectious challenges and maintain a robust immune response.