Didyougetaflushotthisyear?ForthefirsttimetheCentersforDiseaseControlandPreventionintheUSisrecommendingthatallchildrenages6monthsthrough18yearsreceivethefluvaccine.
Vaccinesbattlediseasescausedbybacteriaandviruses.Aweakenedformofthegermisintroducedintothebody.Thebodymakesspecialsubstancescalledantibodiestofightthegerms.Iftheactualgermsweretoattacktheantibodieswouldfightthem.
Becausetherearemanykindsoffluvirusesscientistsmustcreateanewvaccineformula(配方)eachyear.Researchersmustmakeaprediction.
“Thefluvaccineisnotaseffectiveasthepolio(小儿麻痹症)vaccineorthemeasles(麻疹)vaccine”saysDr.WilliamSchaffnerofVanderbiltUniversitySchoolofMedicine.
“It’snotagreatvaccinebutitisquiteagoodvaccine.”
Butafluvaccinedoesn’tworkforeveryone.Therearecertainpeoplewhoshouldbecarefulabouttakingit.Becausethevaccineisproducedfromeggsthosewhoareallergic(过敏的)toeggsshouldnottakeit.Ifyouhaveafeveryoushouldwaituntilyourecover.
Somepeopleareafraidthattheymightgettheflufromtheflushot.Scientistsaythatitisnotpossiblebecausethevirusesintheflushotareinactivated(灭活的).Butsomeminorsideeffectssuchaslow-gradefeverandbodyachescouldoccur.Iftheydotheybeginsoonaftertheshotandusuallylastonlyonetotwodays.
60.Whatisanantibody?
A.Anantibodyisavaccineformula
B.Anantibodyisagermthatisintroducedintothebody
C.Anantibodyisavaccinethatfightsdiseases.
D.Anantibodyisaspecialsubstancetofightgerms.
61.WhichofthefollowingstatementsisNOTtrue?
A.Noteveryoneissuitableforthefluvaccine.
B.Thefluvaccineisnotsoeffectiveasthemeaslesvaccine
C.Fluvirusescreatenewvaccineformulaseachyear.
D.Peoplecan’ttakethefluvaccineatanytime.
62.Itcanbeinferredfromthetextthat_____.
A.scientistsshouldchangethevaccineformulaeachyear
B.vaccinescanbattlediseasescausedbybacteriaandviruses
C.allchildrenages6monthsthrough18yearscanreceivethefluvaccine
D.scientistsareresponsibl
