Describe the difference between innate and acquired immunity. Then explain ONE reason why a person’s immune system could be negatively impacted. Explain how vaccines are used to teach the immune system.
Describe the difference between innate and acquired immunity. Then explain ONE reason why a person’s immune system could be negatively impacted.
Explain how vaccines are used to teach the immune system.
The Correct Answer and Explanation is :
Innate vs. Acquired Immunity
The immune system is divided into two main types: innate immunity and acquired immunity. Innate immunity is the body’s first line of defense against pathogens. It includes physical barriers like the skin and mucous membranes, chemical defenses such as stomach acid, and immune cells like macrophages and natural killer cells that attack invaders non-specifically. This type of immunity is present at birth and provides rapid, general protection against a wide range of pathogens but does not have memory.
In contrast, acquired (adaptive) immunity develops over time as the body is exposed to different pathogens or receives vaccinations. It involves specialized immune cells such as B cells and T cells, which recognize specific antigens and produce a targeted immune response. Acquired immunity is slower to respond initially, but it has memory, meaning it can recognize and react more effectively to previously encountered pathogens in the future.
One Reason the Immune System Can Be Negatively Impacted
One major factor that can weaken a person’s immune system is chronic stress. Stress leads to the continuous release of the hormone cortisol, which suppresses the immune response by reducing the effectiveness of white blood cells. This makes the body more vulnerable to infections, slows down recovery, and increases the risk of diseases.
How Vaccines Teach the Immune System
Vaccines help train the immune system by introducing a weakened, inactive, or part of a pathogen (such as a protein or toxin). This stimulates the immune system to produce antibodies and memory cells without causing the disease. If the real pathogen enters the body later, the immune system recognizes it quickly and mounts a faster, stronger defense. This is how vaccines provide long-term protection against infectious diseases.