1.
Viruses are not considered living things because they are not cellular and they .

do not have proteins
do not have genetic material
must have host cell to reproduce
can't mutate or change their DNA
2.
HIV wipes out a person’s immune system by attacking what types of cells?

B cells
skin cells
helper T cells
red blood cells
3.
People can have the rhinovirus more than once because .

they have no while blood cells
it hides then re-attacks later
the body can't make antibodies
there are many types of the virus