Fever indicates that your body's immune system is doing its job because of two key reasons. One is due to the fever creating a "speed up" in white cell production and the other is due to the fever actually destroying harmful bacteria.
Answer:
In cases of immune system overactivity, the body attacks and damages its own tissues (autoimmune diseases). Immune deficiency diseases decrease the body's ability to fight invaders, causing vulnerability to infections.
Explanation:
