The 33rd Conference on Retroviruses and Opportunistic Infections (CROI) was held from February 22 to 25, 2026, in Denver, Colorado, USA.
Date
Event
August 28, 2025
Submission Opens for General Abstracts on HIV and Hepatitis Viruses and Their Related Conditions, SARS-CoV-2, and Mpox Sciences, as well as New Investigator, International Investigator, and Community Educator Scholarship Applications
October 1, 2025
(5:00 PM Pacific Time)
Submission Deadline for General Abstracts and Scholarship Applications
October 22, 2025
General Registration Opens
November 12, 2025
Dispositions Sent by Email for General Abstracts and Scholarship Applications
December 1, 2025
Submission Opens for Late-Breaking Abstracts on HIV and Hepatitis Viruses and Their Related Conditions, SARS-CoV-2, and Mpox Sciences
Note: Scholarship applications will not be accepted during this submission cycle
December 1, 2025
Media Accreditation Opens
January 5, 2026
2:00 PT
Submission Deadline for Late-Breaking Abstracts
The submission system closes promptly at 2:00 PM Pacific Time.
No submissions will be accepted for review after that time.
January 14, 2026
Deadline to Request Registration Cancellation
January 16, 2026
Dispositions Sent by Email for Late-Breaking Abstracts
January 19, 2026
Registration Fee Increases
February 22 to 25, 2026
CROI 2026
CROI Conference attendees will get access to the Program Guide with Session Information and Presentation Titles, Abstract eBook, and Conference App one week before CROI. Attendees will also have access to the full abstract text on the day the abstract is presented.
Non-registrants will get access to the Program and Information Guide with Session and Presentation Titles one week after CROI, access to abstracts through the Abstract archive on the day after the abstract is presented, and the Abstract eBook 30 days after the close of the conference.