The primary role of the immune response is to protect the body from harmful pathogens, such as bacteria, viruses, and other foreign substances. This complex system involves various types of white blood cells and molecules that work together to identify and eliminate these threats. The immune response can be divided into two main categories: innate immunity, which provides immediate defense, and adaptive immunity, which develops specific responses over time. A robust immune response is vital for maintaining overall health and preventing infections and diseases.