A student researching the immune system has taken the following notes:
• The immune system defends the body against pathogens • White blood cells identify and destroy foreign invaders • Vaccines train the immune system to recognize specific threats • Autoimmune diseases occur when the system attacks healthy cells • Stress and sleep deprivation can weaken immune function
The student wants to explain how vaccines work. Which choice most effectively uses relevant information from the notes?
The immune system uses white blood cells to identify and destroy foreign invaders.
Vaccines work by training the immune system to recognize and fight specific pathogens, preparing it for future exposure.
Autoimmune diseases occur when the immune system mistakenly attacks healthy body cells.
Stress and sleep deprivation can significantly weaken immune function.
Correct Answer: B
Choice B. Training immune system to recognize threats explains how vaccines work.