Viruses infect and live inside the cells of living organisms.
An infection is an illness caused by the invasion of a virus or microorganism.
Microorganisms cause illness inside of the cells of living organisms.
Microorganisms cause what inside of the cells of living organisms?
Options:
a) heat
b) harm them
c) health
d) worms
e) illness
f) resistance
g) Allergies
h) antibodies