Question

A carrier is a human being that

• A. Functions as a reservoir on infection
• B. Possesses pathogen but is not harmed
• C. Contains antibodies sufficient enough to balance the antigen
• D. All of the above

Answer 1

The correct option is D All of the above

• Human beings serve as a reservoir of infection in which an infectious agent normally lives and multiplies.
• The carrier typically harbours the infectious agent (pathogen) without injury to itself and serves as a source from which other individuals can be infected.
• The carrier must contain sufficient antibodies to destroy the antigens, so that carrier is not harmed with the pathogens.

So, the correct answer is 'All of the above'.