Question

Body cells infected by viruses are destroyed mostly by

• A. IgA
• B. Phagocytes
• C. Natural antibodies
• D. Natural Killer cells

Answer 1

The correct option is D Natural Killer cells

• Immunity to viral infection is caused by a variety of specific and nonspecific mechanisms.
• The activation of different immune functions and the duration and magnitude of the immune response depending on how the virus interacts with host cells.
• Cytotoxic T lymphocytes, natural killer (NK) cells and antiviral macrophages can recognize and kill virus-infected cells.
• Hence, Body cells infected by viruses are destroyed mostly by Natural Killer cells.
• So, the correct answer is 'Natural Killer cells'.