Which WBC is primarily involved in fighting viruses?

Which WBC is primarily involved in fighting viruses?

• A. Neutrophils
• B. Lymphocytes
• C. Basophils
• D. Eosinophils

Answer: (B)

Lymphocytes handle viruses because they coordinate targeted, specific immune responses. B cells produce antibodies that neutralize free viruses, T cells destroy virus-infected cells and help coordinate the immune reaction, and natural killer cells can kill infected cells early on. This combination of adaptive and innate lymphocyte activity makes them the primary defenders against viral infections. Neutrophils are more about rapid bacterial cleanup, eosinophils target parasites and contribute to allergies, and basophils drive inflammation through histamine release, so they’re less central to antiviral defense.

Lymphocytes handle viruses because they coordinate targeted, specific immune responses. B cells produce antibodies that neutralize free viruses, T cells destroy virus-infected cells and help coordinate the immune reaction, and natural killer cells can kill infected cells early on. This combination of adaptive and innate lymphocyte activity makes them the primary defenders against viral infections. Neutrophils are more about rapid bacterial cleanup, eosinophils target parasites and contribute to allergies, and basophils drive inflammation through histamine release, so they’re less central to antiviral defense.