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