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    分分彩计划免费版

    2019-03-28 15:15:47 来源: 新华网

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    分分彩计划免费版

    GlobaleffortaimstofinddiseasevectorsthatcanjumpfromanimalstohumansChinawillhelpleadaprojecttoidentifyunknownvirusesfromwildlifetobetterpreparehumansformajorepidemics-ifnotglobalpandemics.Theprojectistobelaunchedthisyear,accordingtooneofthecountry'stophealthofficials.TheGlobalViromeProjectwillstartinChinaandThailandwithfieldworktocollectsamplesfromwildanimalsandanalyzethevirusesdetected,saidGaoFu,headoftheChineseCenterforDiseaseControlandPrevention."Scientistswillcollectvirussamplesfromanimalssuchasbatsandratsforstudyusingtechniqueslikenextgeneration(DNA)sequencingtofindwhethernewvirusesexist,"hesaid.Theproject,estimatedtocostupto$1.2billion,isexpectedtotake10yearsandinvolvesmanycountriesincludingtheUnitedStates,BrazilandNigeria.Throughmoreintensiveandextensivestudyofvirusesfromanimalsthatcouldinfecthumans,itmaybepossibletodealwithvirusesusingpreemptivecontrolsandpreventioninsteadofpassive,reactivemeasures,Gaosaid."Weallknowtherearealmostcertainlynewvirusesthatcouldcausethenextglobalpandemic,butbasedontheexistingearlywarningcapacityfordiseases,wedonotknow,forexample,whichviruswillcauseanepidemic,"Gaosaid."Wearesurethatnewvirusstrainswillappearinthefuturealongwithchangesinourecology,environmentandhumanbehaviors."Forinstance,humans'abuseofantibioticshasleadtothepotentialdevelopmentofsuperbugs."Therearemanyviruseslivinginwildanimals,sowecanidentifyvirusesandthoroughlystudythosethatcouldpasstohumans,"Gaosaid."Ideallywecandevelopvaccinesandadiagnosisforsuchvirusesevenbeforetheycausehumanepidemics."Itisknownthat263virusescaninfecthumans,butscientistsestimatetheremaybemorethanhalfamillionvirusesthatliveinbirdsandmammalsandthatareunknowntohumansthatmaybecapableofinfectinghumans,andtheyaretheprimarysubjectoftheproject'sresearch,Gaosaid.Evenifalargenumberofsuchunknownvirusesareidentified,itispossiblethatjustasmallfractionofthemhavetheabilitytocausemajorepidemicsthatcausehumandeaths,hesaid.However,consideringthehugecostofamajorepidemiclikeSARStohumanhealthandeconomies,thefindingsoftheprojectstillhavethepotentialtogreatlyreducelossesthroughimprovedearlydiagnosisandidentificationofhostsvulnerabletoanewvirusafteranoutbreak,accordingtoGao.AsimilarprojectcarriedoutbytheUSAgencyforInternationalDevelopmentprovedthefeasibilityoftheGlobalViromeProjectandprovideshelpfulexperience,hesaid.TheUSAIDproject,knownasPredictandlaunchedin2009,withChinaaparticipant,ledtofindingsofmorethan1,000virusespreviouslyunknowntohumans.Theprojectcostwasover$170million,hesaid.SomeofthetechnologiesusedforthatprojecthaveprovedreliableandeconomicallyaffordableandcanbeusedfortheGlobalViromeProject,Gaosaid.  

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