Immunity

Question 1

naturally acquires (active)

Answer 1

infection, contact with pathogen

Question 2

naturally passive

Answer 2

antibodies pass from the mother to fetes via placenta or to infant in her milk

Question 3

artificially active

Answer 3

vaccine, dead or attenuated pathogens

Question 4

artificially passive

Answer 4

infection of immune serum, antibodies from another person given in IV infusion