艾滋病英语作文：About AIDS

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theworldhealthanizationsaysasmanyas10millionpersonsworldwidemayhavethevirus(病毒)thatcausesaids.expertsbelieveabout350thousandpersonshavethedisease.andonemillionmoremaygetitinthenextfiveyears.intheunitedstates,about50,000personshavediedwithaids.thecountry’stopmedicalofficialsaysmorethan90percentofallamericanswhohadtheaidsvirusfiveyearsagoaredead.?

thereisnocureforaidsandnovaine(疫苗)mediciopreventit.however,researchersknowmuchmoreaboutaidsthantheydidjustafewyearsago.wenowknowthataidsiscausedbyavirus.thevirusinvadeshealthycellsincludingwhitebloodcellsthatarepartofourdefensesystemagainstdisease.ittakescontrolofthehealthycell’sgeic(遗传的)materialandforcesthecelltomakeacopyofthevirus.thecellthendies.andtheviralparticlesmoveontoinvadeandkillmorehealthycells.theaidsvirusiscarriedinaperson’sbodyfluids.theviruscanbepassedsexuallyorbysharinginstrumentsusedtotakeintravenous(静脉内的)drugs.italsocanbepassedinbloodproductsorfromapregnantwomanwithaidstoherdevelopingbaby.?

manystoriesaboutthespreadofaidsarefalse.youcannotgetaidsbyworkingorattendingschoolwithsomeonewhohasthedisease.youcannotgetitbytouching,drinkingglassesorotherobjectsusedbysuchpersons.expertssaynoonehasgottenaidsbylivingwith,caringforortouchinganaidspatient.?

thereareseveralwarningsignsofanaidsinfection.theyincludealwaysfeelingtired,unexplainedweightlossanduncontrolledexpulsionofbodywastes(大小便失禁).otherwarningsaretheappearanceofwhiteareasonthemouth,darkredareasofskinthatdonotdisappearandahigherthannormalbodytemperature.