VOA常速阿斯利康新冠疫苗引起脊髓炎

PharmaceuticalfirmAstrazenecaannouncedthepauseofthetrialWednesday,afteroneoftheBritishparticipantsfellillreportedlywithtransversemyelitis.Inflammationofthespinalcord,theparticipantisexpectedtorecover.ThecoronavirusvaccinedevelopedbyAstrazenecaandoxforduniversity,isseenasoneofthemostpromisingofdozensunderdevelopmentaroundtheworld.Aftersuccessfulearlystagetrials,ithadmovedtophase3testinginrecentweeks,involving30,participantsintheUnitedStates,Britain,BrazilandSouthAfrica.Scientistsemphasizedthatthereisnoindicationyetthattheparticipantsillnessislinkedtothevaccine.Youregivingthevaccinetoverylargenumbersofpeople.Andatanygiventimerandomlybychance,itsquitepossiblesomeofthoseparticipantsmayhavehealthproblemsthathappento

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