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
