The upcoming discussion will update you about the difference between active immunity and passive immunity. Difference # Active Immunity: 1. Host participation: Produced actively by the immune system of host. 2. Activation: Induced by infection or by contact with immunogen. 3. Duration of effectivity: Immune response-durable and effective. 4. Time: Immunity effective only after lag period. 5. Memory: Immunological memory [...]
In this article we will discuss about the active and passive type of acquired immunity. Type # 1. Active Immunity: Adaptive immunity that is induced by natural exposure to a pathogen or by vaccination. It can be categorized into two types: Naturally acquired active immunity: Active immunity is acquired through continuing, subclinical infections, caused by bacteria and viruses, which largely [...]
Several types of hypersensitive reactions can be identified, reflecting differences in the effector molecules generated in the course of the reaction. Gell and Coomb described four types of hypersensitivity reactions (Types I, II, III and IV). The first three types are antibody-mediated and the fourth type is mediated mainly by T-cell and macro-phases i.e. cell-mediated (Table 11.1 and 11.2; Fig. [...]