1. It is developed when the person’s own cells produce antibodies in response to infection or vaccine.
2. It provides relief only after long period.
3. It has no side effects.
4. It is long lasting.
1. It is developed when antibodies
produced in other organisms are injected into a person to counter act
antigen such as snake venom.
2. It provides immediate relief.
3. It may cause reaction
.4. It is not long lasting.