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AACR Annual Meeting Embargo Policy

Last updated November 18, 2020

On October 27, 2020, after careful consideration, the American Association for Cancer Research Board of Directors made the decision to convene the AACR Annual Meeting 2021 in a virtual format. This decision was made to prioritize the health and safety of attendees and the patients and communities they serve.

Meeting Dates: The AACR Program Committee is currently working to reconfigure the scientific program to create an engaging virtual meeting experience. The AACR Annual Meeting 2021 will be held virtually from April April 10-15 and May 17-21

Please read the following information closely. You may contact Julia Gunther at [email protected] with additional questions about the AACR’s embargo policy.


Abstracts will be posted to the online itinerary planner at the time embargoes lift. The dates when embargoes lift are:

  • Regular abstract titles, authors, and text release on March 10, 2021 at 4:30 p.m. ET
  • Late-breaking and clinical trials abstract titles, and authors ONLY (no text) release on March 10, 2021 at 4:30 p.m. ET
  • Late-breaking and clinical trials abstract text release on April 9, 2021 at 12:01 a.m. ET

Outside Press Releases

Public information officers or public relations firms representing academia or industry with abstracts in the meeting can issue press releases on information that is publicly available via the AACR’s online itinerary planner. 

Embargo Violations: Presenters and Public Relations

Presenters, their companies/institutions, and affiliated public relations representatives who break the AACR’s embargo policy as outlined above could jeopardize an abstract’s placement in the scientific program and press events.

Embargo Violations: Media

Individuals registered as press for the AACR Annual Meeting 2021 agree to abide by all embargoes. In advance of the meetings, the AACR may provide abstracts, press releases, and other materials under embargo to facilitate accurate and comprehensive reporting. Failure to abide by the AACR’s embargoes may result in removal from AACR pre-embargo press lists and dismissal from current and future AACR meetings.