Active immunity in science definition and examples

Before we explore active immunity, let's briefly understand the immune system's primary role. The immune system acts as our body's defense mechanism, protecting us from harmful pathogens such as bacteria, viruses, and fungi. It comprises two main branches: the innate and adaptive immune systems. While the innate system provides immediate, non-specific defense, the adaptive system offers a targeted, long-lasting response. Active immunity is a crucial aspect of the adaptive immune system.