Who is considered a susceptible host?

A susceptible host is characterized by their vulnerability to infections due to factors that compromise their body's ability to fight off pathogens. Individuals with compromised immune systems are particularly at risk because their physiological defenses against infection are weakened, making it easier for pathogens to take hold and cause disease.

While healthy individuals may become infected under certain circumstances, they generally have stronger immune responses that prevent infections from easily establishing. Those with chronic illnesses can also be at increased risk, but it is primarily the compromised immune systems—whether due to medical conditions, treatments, or age—that categorize someone as a susceptible host. Therefore, identifying someone with a compromised immune system as a susceptible host is essential in understanding infection control and preventive measures in dental and healthcare settings.