Brazilian health authority Anvisa said on Wednesday that a volunteer in a clinical trial of the COVID-19 vaccine developed by AstraZeneca and the University of Oxford had died, saying they had received data from an investigation into the matter.
The regulator said testing of the vaccine would continue after the volunteer died. He did not provide any further details, citing the medical confidentiality of those involved in the trials.
The Federal University of Sao Paulo, which helps coordinate phase 3 clinical trials in Brazil, separately said the volunteer was Brazilian but did not specify where the person lived.
AstraZeneca stock turned negative and fell 1.7%.