AstraZeneca puts leading COVID-19 vaccine trial on hold over safety concern

The study is testing a COVID-19 vaccine being developed by AstraZeneca and University of Oxford researchers at various sites, including the United Kingdom, where the illness was reported.

AstraZeneca Plc on Tuesday said it has paused a late-stage trial of one of the leading COVID-19 vaccine candidates after an unexplained illness in a study participant.