Multiple Choice
The majority of vaccines work by eliciting pathogen-specific antibodies that circulate in our bodies and protect us in the event that we are later exposed to that specific pathogen. For most viruses and bacterial toxins that we are vaccinated against, these pre-existing antibodies are protective because:
A) They neutralize the virus or toxin, preventing it from attaching to and entering our cells.
B) They bind to the virus or toxin and carry it to the liver where it can be degraded.
C) They bind to the virus or toxin and directly induce lysis.
D) They induce mucus production that helps flush the toxin or virus out of the body.
E) They bind to epithelial cells and induce the production of antimicrobial peptides.
Correct Answer:

Verified
Correct Answer:
Verified
Q19: One major difference between the innate and
Q20: When complement proteins are covalently deposited onto
Q21: A common mechanism by which sensor cells
Q22: Innate lymphoid cells and NK cells are
Q23: One factor that contributes to the enhanced
Q25: Adaptive immune responses are slow to develop,
Q26: Some Pattern Recognition Receptors (PRRs) recognize nucleic
Q27: The immune system evolved to protect us
Q28: When macrophages in a tissue encounter bacteria,
Q29: Inherited immunodeficiency diseases result from a single