Multiple choice

Which of the following statements about vaccines is/are correct?

a. A vaccine is an antigen that is injected or swallowed. b. Antigens are treated before being introduced into the body of the person in order to make them relatively harmless. c. Antigens cause the development of active immunity in a patient.

  1. only a

  2. only b

  3. only c

  4. a, b and c

  5. Both a and c
Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

This is the correct answer as all the statements about vaccines are correct.

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