An individual who is infected with pathogens but shows no signs of illness is called a(n):

• A. vector
• B. host
• C. carrier
• D. reservoir

Answer: (C)

Verified step by step guidance

1. Understand the definitions of each term provided in the options:
2. 1. Vector: An organism, often an insect, that transmits a pathogen from one host to another.
3. 2. Host: An organism that harbors a pathogen, which may or may not show symptoms of disease.
4. 3. Carrier: An individual who is infected with a pathogen but does not show symptoms of illness, yet can still transmit the pathogen to others.
5. 4. Reservoir: A natural habitat or environment where a pathogen normally lives and multiplies, which can be living organisms or non-living materials.
6. Identify that the question specifically describes an individual infected but asymptomatic, which matches the definition of a 'carrier'.