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Brazil Halts Chinese Vaccine Trial


The Brazil government said Monday it had suspended a late-stage trial of a vaccine from the Chinese company Sinovac.
This company had been considered a global front-runner, after a “serious adverse” reaction in a participant.
The Brazilian health regulator provided little information on its decision. 
Dimas Covas, head of the medical center coordinating the trials there, told a Brazilian television network that he found the decision strange “because it’s a death unrelated to the vaccine,” called CoronaVac.
The participant who had the reaction became ill on Oct. 29, according to the authorities. 
They did not divulge what had happened to the volunteer, citing patient confidentiality. 
Adverse effects are not unusual in Phase 3 trials.
CoronaVac is one of 11 experimental vaccines currently in Phase 3 trials.

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