Active immunity

Passive immunity

a) It is developed when the person's own cells produce antibodies in response to infection or vaccine.

a) It is developed when antibodies produced in other organisms are injected into a person to counter act antigens such as snake venom.

b) It provides relief only after long period.

b) It provides immediate relief.

c) It has no side effects.

c) It may cause reaction.

d) It is long lasting.

d) It is not long lasting.