The immune system provides protection from infectious diseases and has both specific and nonspecific components. It recognizes foreign substances and mounts an effector response, while also developing memory responses. The immune system consists of natural and artificial immunity, with natural immunity including biological, chemical, general, and physiological barriers as the first line of defense, while artificial immunity involves active and passive immunization developed from the discoveries of scientists like Jenner, Pasteur, von Behring, Koch, and Metchnikoff.

1. Overview of Immune
System

2. C
O
N
T
E
N
T
Immune system
Recognition
Response
Natural Immunity
Artificial Immunity

3. Immunity
Immunity – State of Resistance or insusceptibility
exhibited to host to toxic substance
Immunity – State of Protection from infectious diseases it
has both specific and non specific components.
Immunis – Exempt (in Latin)

4. Immunity
Immunity – Innate (Non specific)
Immunity – Adaptive (Acquired or Specific)
Immunis – Self or Non self

5. 1
Recognition
2
Effector
Response
Memory
Response

6. HOST DEFENSE
1
Non Specific
Resistance
2
Acquired Immunity
1. Biological Barriers
2. Chemical Barriers
3. General Barriers
4. Physiological Barriers
Natural Artificial
Active Passive
Passive Active

7. Non Specific Resistance
1. Biological Barriers
2. Chemical Barriers
3. General Barriers
4. Physiological Barriers

8. Acquired Immunity

9. 1 Lady Montagu (1718)
2 Edward Jenner (1798)
3 Louis Pasteur (1885)
4 Von Behring(1901)
5 Robert Koch (1905)
6 Metchnikoff (1908)