What can cause a person to become a susceptible host?

A susceptible host refers to an individual who is more likely to become infected due to various factors that weaken their physical defenses. Lack of physical resistance is a significant factor in this context. This could be due to several reasons, such as underlying health conditions, weakened immune systems, age (very young or elderly), or certain lifestyle choices that compromise overall health. When these defenses are diminished, pathogens can easily invade and cause infection.

In contrast, strong hygiene practices, high nutrient intake, and isolation from others typically enhance an individual's resistance to infection. Good hygiene practices can reduce the likelihood of exposure to harmful pathogens, high nutrient intake can strengthen the immune system, and isolation from others can decrease the risk of being exposed to infectious agents. Therefore, the correct understanding of what makes a person a susceptible host revolves around an individual’s lack of physical resistance to infections.