How does inoculation protect the body against infectious diseases?
A) Booster substances are injected to increase the strength of the immune system.
B) The antibody for a specific infection is injected to be available to defend the body.
C) Small amounts of disease-causing substances are injected to stimulate the body to produce antibodies.
Question 2
Unbroken skin and cellular secretions, such as mucus, are examples of _____ immunity.
A) natural
B) passive acquired
C) natural acquired
D) artificial acquired