“Late Monday, the Data and Safety Monitoring Board (DSMB) notified NIAID, BARDA, and AstraZeneca that it was concerned by information released by AstraZeneca on initial data from its COVID-19 vaccine clinical trial,” the statement says. “The DSMB expressed concern that AstraZeneca may have included outdated information from that trial, which may have provided an incomplete view of the efficacy data.
“We urge the company to work with the DSMB to review the efficacy data and ensure the most accurate, up-to-date efficacy data be made public as quickly as possible.”
AstraZeneca has not responded to CNN’s request for comment.
Last year, the National Institutes of Health appointed a common DSMB to monitor Covid-19 vaccine clinical trials that were being funded by the federal government — including AstraZeneca, Moderna and Johnson & Johnson. This DSMB has 10 to 15 members with specialties including vaccine development, statistics and ethics.
DSMBs sometimes disagree with investigators over the interpretation of trial results, Stephen Evans, a professor of pharmacoepidemiology at the London School of Hygiene & Tropical Medicine, said in a statement to the Science Media Centre in the UK. But that’s usually done in private, he said, “so this is unprecedented in my opinion.”
However, he noted, he isn’t concerned unless there’s a safety issue, “which does not appear to be the case.”
Jamie Gumbrecht contributed to this report.