____________________
are
living
pathogens
that
can
be
treated
with
antibiotics
.
Viruses
are
non
-
living
pathogens
that
need
a
____________________
to
reproduce
.
Parasites
are
living
pathogens
that
feed
off
nutrients
from
a
host
.
Fungi
are
living
single
or
multicellular
pathogens
like
yeast
or
mushrooms
.
A
____________________
is
a
weakened
version
of
a
virus
or
bacteria
that
is
injected
to
trigger
the
____________________
system
.
Antibodies
are
produced
by
the
immune
system
to
fight
off
harmful
germs
.
Viruses
can
change
or
____________________
,
causing
us
to
have
to
get
vaccines
every
year
.
