A moderate fever helps the body fight infection mainly because
- A. it melts the cell walls of bacteria
- B. it replaces damaged white blood cells
- C. it dissolves antigens directly
- D. the raised temperature speeds defence reactions and slows some pathogens
Explanation
Metabolic and immune reactions run faster at slightly higher temperature while many microbes grow more slowly, so fever is a defence rather than merely a symptom. Only very high fever becomes dangerous.