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