CROI Conference on Retroviruses and Opportunistic Infections 2027
- Dates
- March 21–24, 2027 Confirmed
- Location
- San Diego Convention Center, San Diego, United States
- Expected attendance
- About 4,000
- Therapy area
- Infectious Diseases
About the meeting
The 34th Conference on Retroviruses and Opportunistic Infections (CROI) welcomes consequential original research on HIV, hepatitis viruses, SARS-CoV-2, mpox, and emerging viral infections and related conditions. Established in 1993, CROI provides a forum for basic scientists and clinical investigators to present, discuss, and critique research into the epidemiology and biology of human retroviruses and associated diseases.
Description from the official CROI website. Abstracts are published in Topics in Antiviral Medicine.
Key dates for CROI 2027
| Milestone | Date | Status |
|---|---|---|
| Abstract submission opens | August 27, 2026 | Confirmed |
| Abstract submission deadline | October 1, 2026 | Confirmed |
| Late-breaking abstract deadline | January 19, 2027 | Confirmed |
| Abstract notification | November 12, 2026 | Confirmed |
| Meeting | March 21–24, 2027 | Confirmed |
Planning ahead: CROI's abstract deadline usually falls about 5 months before the meeting. For the 2026 meeting it was October 1, 2025 (144 days ahead); for the 2025 meeting it was October 1, 2024 (159 days ahead).
CROI 2027
- Length
- Title up to 100 characters including spaces. 2027
- Who can submit
- The submitter must be the presenting author or a coauthor. Case reports, meta-analyses and systematic reviews generally not accepted unless of major public health significance. 2027
- Membership required
- No 2027
- Previously presented work
- In general, CROI does not accept work that has been previously published or publically presented (especially at a conference of more than 400 attendees). Consideration may be given to a submission if meaningful newer data or different analyses are included. If the study data or abstract information has been published, submitted for publication where publication is anticipated on or before December 31 before the CROI where it is to be presented, or presented at any other major national or international scientific or medical conference (i.e., generally 400 or more attendees), authors will be asked to provide details on the previous presentation or publication. These details include name and year of prior or upcoming conference, publication information or submission for publication, and whether the prior abstract is copyrighted. Abstract text that is under copyright by a publication or conference should not be submitted verbatim to CROI. In addition, authors will be asked about the data that have been updated for presentation at CROI. An abstract presented at an approved CROI preconference workshop is eligible for presentation at CROI as long as the information remains under embargo until it is presented at CROI (not released outside of the affiliated meeting). 2027
Summarized from CROI's guidelines, checked October 22, 2026. The official guidelines always take precedence.
Common questions
When is the CROI 2027 abstract deadline?
The abstract submission deadline is October 1, 2026 (confirmed), and late-breaking abstracts are due January 19, 2027 (confirmed).
When and where is CROI 2027?
CROI 2027 takes place March 21–24, 2027 at San Diego Convention Center in San Diego, United States. The dates are confirmed.
How many people attend CROI?
About 4,000 people are expected at CROI 2027.
Past editions
| Year | Meeting dates | City | Abstract deadline |
|---|---|---|---|
| 2026 | February 22–25, 2026 | Denver. | October 1, 2025 |
| 2025 | March 9–12, 2025 | San Francisco | October 1, 2024 |
| 2024 | March 3–6, 2024 | Denver | Not recorded |
| 2023 | February 19–22, 2023 | Seattle, WA | Not recorded |
Last updated October 22, 2026. Source: Orbytel Group conference database. Dates marked estimated or not yet announced are our projections, not the organizer's.