What inhibits viruses from entering and attacking healthy cells?
A) membrane-attack complexes (MAC)
B) keratin
C) interferons
D) pyrogens
E) complement

Question

Quizplus · Accepted Answer

Interferons are signaling proteins released by infected cells to signal neighboring healthy cells to produce antiviral proteins, which inhibit viral replication and protect healthy cells from viral infection.

Answer: A and E 
 Membrane-attack complexes (MAC) and complement are part of the innate immune system that work together to form pores in the membranes of invading viruses and bacteria, leading to their destruction. This process prevents viruses from entering and attacking healthy cells.

What Inhibits Viruses from Entering and Attacking Healthy Cells