经典的英文演讲稿

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1、经典的英文演讲稿(1)TheWorldHealthOrganizationisurginghealthofficialstobancommonly-availablebloodtestsfortuberculosis.W.H.O.officialsmadethecallaftertwostudiesfoundthatresultsfromacommonlyusedtestareundependableandmisleading.Thebloodtestsarelow-costandproducefastresults.Theyarewidel

2、yusedindevelopingcountries,especiallyIndia.TheIndiangovernmentsaysthecountryhasmorethantwomillionnewcasesofTBayear.VOAAbloodtestusedtodetecttuberculosis.But,researcherssaythetestsbeingsoldaredangerouslyinaccurate.Theysaytheresultsarewronginfiftypercentofpatients.DavidDowdys

3、tudiesinfectiousdiseasesattheJohnsHopkinsBloombergSchoolofPublicHealthinBaltimore,Maryland.Heledoneofthestudies.DAVIDDOWDY:"Thesetestsareactivelydoingpeopleharmbycausingthemeithertotakemedicinesthattheydon'tneedordelayingthediagnosisthattheyactuallydoneed,togetbetter."Tradi

4、tionaltestsforTBexaminethesputum,amaterialfoundinaperson'slungs.ActiveTBisidentifiedifcertainbacteriumgrowsinthetestmaterial.However,theseteststakelongertocarryout.Dr.Dowdysaysthebloodtestsarewidelyusedbecauseofthespeedofresults.DAVIDDOWDY:"Whatthesetestsdoistheymeasureanti

5、bodiesinthebloodagainstTBsoanytimeanyonehasbeeninfectedwithTBatanytimeintheirlife,theywilldevelopantibodies.Theproblemisthatoneperson'santibodiesarenotgoingtobethesameasanotherperson'santibodies.Andwedon'thaveatestyetthatcandetecttheseantibodiesacrosstheboard."Theleaderofth

6、eotherstudywasMadhukarPai,anepidemiologistatMcGillUniversityinMontreal,Canada.Hesaysthetestsareusuallyusedbyprivatemedicalcenters--notgovernmentTBcontrolprograms.MADHUKARPAI:"Sothesetestsareuniformlynotusedinthedevelopedworld.Theyaremostlyusedincountrieswithweakregulation,a

7、ndlackofregulationallowsthesesortsofteststobeonthemarketandusedfreely."Expertssaythebloodtestsareabigbusinessindevelopingcountries,worthmillionsofdollarsayear.TheWorldHealthOrganizationsaysamillionofthetestsaredoneeveryyear.But,thetestsarenotapprovedbyanyrecognizedsuperviso

8、rygroup.Dr.PaialsosaystheWHOispushingscientiststocontinueresearchforaquicktest.MAD