____________________
are
tiny
living
things
and
viruses
that
can
cause
____________________
in
humans
.
They
are
also
known
as
____________________
.
They
enter
the
____________________
through
cuts
in
the
____________________
,
through
the
nose
and
mouth
when
we
____________________
,
and
through
____________________
food
and
drinking
____________________
.
A
person
who
is
ill
notices
____________________
like
aches
,
pains
,
and
tiredness
.
A
medical
professional
looks
for
____________________
such
as
fever
,
or
a
rash
on
the
skin
.
The
stages
of
____________________
disease
include
the
infection
,
the
____________________
and
the
____________________
.
