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艾滋病英语作文：
About AIDS
艾滋病英语作文：
About AIDS
艾滋病英语作文：
About AIDS
the
world
health
organization
says
as
many
as
10
million
persons
worldwide
may
have
the
virus(
病
毒
)
that
causes
s
believe
about
350
thousand
persons
have
the
one
million
more
may
get
it
in
the
next
five
the united states,about 50,000 persons have died with
country
s
top
medical
official
says
more
than
90
percent of all americans who had the aids virus five years ago
are dead.?
there is no cure for aids and no vaccine(
疫苗
) medicine to
prevent
r,researchers
know
much
more
about
aids
than they did just a few years now know that aids is
caused
by
a
virus
invades
healthy
cells
including
white blood cells that are part of our defense system against
takes
control
of
the
healthy
cell
s
genetic(
遗传的
)
material and forces the cell to make a copy of the virus. the cell
the
viral
particles
move
on
to
invade
and
kill
more healthy aids virus is carried in a person s body
virus
can
be
passed
sexually
or
by
sharing
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