What characterizes a susceptible host?

A susceptible host is characterized by a person who is likely to become infected or develop a disease due to weakened body defenses. This condition may arise from various factors, such as an underlying medical condition, immunosuppressive therapy, inadequate nutrition, or age-related vulnerabilities.

In essence, a susceptible host lacks the necessary physical barriers and immune responses that typically protect against pathogens. This makes them more at risk for infections since their bodies might struggle to fight off invading microbes. Understanding the factors that contribute to a host's susceptibility is crucial in infection control and prevention strategies in healthcare settings.

The other choices reflect individuals who generally exhibit stronger defenses or protective measures against infections. For instance, a healthy person with robust defenses is less likely to be classified as a susceptible host. Similarly, individuals who have been vaccinated or those with previous infections may have developed some immunity, making them less susceptible to new infections.