A person at risk of infection due to reduced immunity is called a what?

• A. Infected Carrier
• B. Susceptible Host
• C. Reservoir
• D. Portal Of Exit

Answer: (B)

Facing infection because the immune system is weakened is described as a susceptible host. This term focuses on the person’s vulnerability and how reduced immunity allows microorganisms to establish infection or disease. A host becomes more susceptible due to factors like age, nutritional status, chronic illness, or immunosuppressive medications, which lessen the body’s ability to fight off pathogens. In contrast, an infected carrier is someone who harbors the organism and can spread it, a reservoir is where the pathogen lives and multiplies, and a portal of exit is the route by which the organism leaves its source to reach another person. The idea here is that infection depends on the pathogen meeting a susceptible host who cannot effectively defend against it.