Enrollment in the
British drugmaker's global trials of the vaccine, which it is developing with researchers at Oxford University, was paused on Sept. 6, after a participant in its U.K. trial had a serious side effect thought to be a rare spinal inflammatory disorder called transverse myelitis.
Safety reviews were conducted when volunteers in the trials for testing the vaccine candidate, called AZD1222 or ChAdOx1 nCoV-19, developed unexplained neurological symptoms including changed sensation or limb weakness, and the study was paused while a safety review took place, according to the document.
AstraZeneca and Oxford University did not immediately respond to Reuters requests for comment.