Press release

Tuesday, March 23, 2021

On Monday, the Data and Security Monitoring Board (DSMB) notified NIAID, BARDA and AstraZeneca that it was concerned about the information released by AstraZeneca about the initial data from its clinical trial of the COVID-19 vaccine. The DSMB expressed concern that AstraZeneca may have included outdated information from that study, which may have provided an incomplete view of the efficacy data. We urge the company to work with the DSMB to review effectiveness data and ensure that the most accurate and up-to-date effectiveness data is made public as soon as possible.

Authorization and guidelines for the use of the vaccine in the United States will be determined by the Food and Drug Administration and the Centers for Disease Control and Prevention, after a complete review of the data by independent advisory committees.

About the National Institutes of Health (NIH):
NIH, the country’s medical research agency, includes 27 institutes and centers and is a component of the United States Department of Health and Human Services. The NIH is the leading federal agency that conducts and supports basic, clinical and translational medical research, and is investigating the causes, treatments and cures for common and rare diseases. For more information about NIH and its programs, visit www.nih.gov.

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