Which of the following statements correctly describes vaccines and how they help prevent viral infection?
A) Vaccines are active versions of a virus that stimulate an immune reaction in a person.
B) Vaccines are inactive versions of a virus that stimulate an immune reaction in a person.
C) Vaccines are infectious proteins that stimulate an immune reaction in a person.
D) Vaccines are functional pathogens that stimulate an immune reaction in a person.

Question

Quizplus · Accepted Answer

Vaccines often contain inactivated (killed) viruses or parts of the virus structure (like proteins) that are not capable of causing disease. These components stimulate the immune system to respond, preparing it to fight the actual virus if the person is exposed to it in the future. Vaccines do not contain active or functional pathogens that can cause disease in the person receiving the vaccine.

Which of the Following Statements Correctly Describes Vaccines and How