Consider statements about human immunity: 1. Active immunity involves the body producing its own antibodies. 2. Passive immunity involves receiving pre-formed antibodies. 3. Vaccination provides passive immunity. Which are correct? MCQ with Answer and Explanation

Active immunity occurs when the body's own immune system is stimulated by an antigen (either through infection or vaccination) to produce its own antibodies and memory cells, providing long-lasting protection. Passive immunity occurs when an individual is directly given pre-formed antibodies (like through mother's milk or antiserum), providing immediate but temporary protection. Vaccination stimulates the body to produce its own immune response, thus providing artificial active immunity, not passive. Thus, statements 1 and 2 are correct.