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1、时文阅读为什么有些人不易被流感病毒感染面对疫情，我们在做好了自身防护的同时，是否存有这样的疑问：为什么在疫情爆发的地区，同一环境下有人被感染，有人却能安然无恙？为什么有些人不易被流感病毒感染？跟着我们一起解开心中的疑惑吧。阅读短文并回答问题Whyaresomepeoplebetterabletofightoffthefluthanothers?Partoftheanswer,accordingtoanewstudy,isrelatedtothefirstflustrainweencounterinchildhood.ScientistsfromUCLAandtheUniver
2、sityofArizonahavefoundthatpeople’sabilitytofightoffthefluvirusisdeterminednotonlybythesubtypesofflutheyhavehadthroughouttheirlives,butalsobythesequence（顺序）inwhichtheyhavebeeninfectedbythoseviruses.Theirstudywaspublishedintheopen-accessjournalPLoSPathogens.Theresearchoffersanexplanationforwh
3、ysomepeoplebecomemuchworsethanotherswheninfectedwiththesamestrainofthefluvirus.Inaddition,UCLAscientists,includingProfessorJamesLloyd-Smith,whowasalsoaseniorauthorofthePLoSPathogensresearch,recentlycompletedastudythatanalyzedtravel-relatedscreeningforthenovelcoronavirus（冠状病毒）2019-nCoV.There
4、searchersreportedthatscreeningtravelersisnotveryeffectiveforthe2019coronavirus—thatitwillcatchlessthanhalfofinfectedtravelers,onaverage—andthatmostinfectedtravelersareundetectable,meaningthattheyhavenosymptomsyet,andareunawarethattheyhavebeenexposed.Sostoppingthespreadofthevirusisnotsimplya
5、matterofenhancingscreeningmethodsatairportsandothertravelcenters.“Thisputstheonusongovernmentofficialsandpublichealthofficialstofollowupwithtravelersaftertheyarrive,toisolatethemandtracetheircontactsiftheygetsicklater,”saidLloyd-Smith,aUCLAprofessorofecologyandevolutionarybiology.“Manygover
6、nmentshavestartedtoimposequarantines（隔离）,oreventravelbans,astheyrealizethatscreeningisnotsufficienttostopthespreadofthecoronavirus.”Onemajorconcern,Lloyd-Smithsaid,isthatothercountries,especiallydevelopingnations,lacktheinfrastructureandresourcesforthosemeasures,andarethereforevulnerabletoi
7、mportingthedisease.“MuchofthepublichealthworldisveryconcernedaboutthevirusbeingintroducedintoAfricaorIndia,wherelargepopulationsexistthatdonothaveaccesstoadvancedmedicalcare,”hesaid1.Whatisthesignificanceofthescientists’research?A.Itexplainsthecauseofthe
