What are the dates for CROI 2024?

CROI 2024 will be held from March 3 to 6 in Denver, Colorado, USA.


When will registration open?

Registration for CROI 2024 will open in December 2023.

What is included in the registration fee?

The registration fee includes access to the conference and the conference materials.

Is CROI 2024 going to have a virtual registration?

Yes, however, virtual registration will give access to live presentations and on-demand content only.

I live in Denver. Do I still need to book a hotel?

All in-person CROI registrants are required to reserve a hotel room through the CROI housing system in order to attend CROI 2024. Exceptions are allowed if the registrant is a permanent resident in the Denver area (ie, live within 50 miles) or the registrant is sharing a room with an approved CROI attendee with accommodations booked via the CROI housing system. Other exceptions must be approved by the CROI organizers by submitting a hotel waiver. Please email the request to


How were accepted International Investigator Scholarships determined?

International Investigator Scholarships are awarded to those who have an accepted abstract to CROI and are from a resource-limited setting, as determined by the low- and middle-income country (LMIC) list published by the World Bank.


What is the submission deadline for abstracts?

The submission deadline depends on the subject matter of the abstract (eg, general or late-breaking) Visit the Important Dates and Deadlines page for details on the varying submission deadlines for CROI. 

I had an abstract submission system profile for a prior CROI. Why am I not able to access my profile?

CROI profiles for the abstract submission system are reset each year to ensure that updated information is obtained for authors and coauthors of abstracts. You will need to create a new account in the abstract submission system. 

Do I need to update my password every time I edit my CROI submission profile?

No, you do not need to update your password every time you edit your submission profile. You can proceed to save changes to your submission profile without refilling out the password section. 

How was my name and contact information added to my CROI profile?

Your name and contact information on your CROI profile will appear as it was entered when your profile was created by you or your abstract coauthor. You may update your profile within the abstract system. See Abstract Guidelines and Submission for more information and to access the abstract system. 

I am a submitting author and made a spelling error in the name of my coauthor(s). How can I update their information?

Before the submission deadline, the submitter may log in and edit coauthor details from within the abstract. After the submission deadline, contact for corrections to the author’s information. 

I have entered the information (ie city/state/country/degree) for a co-author incorrectly. How can I change this?

Only the co-author can edit their profile information. Each co-author will receive an email once an abstract has been submitted. If the co-author’s profile information is wrong, the co-author must log in and change it.  

How do I update an author's institution on an abstract submission?

The submitting author can make changes to the abstract submission by editing the author’s information within the abstract. See Abstract Guidelines and Submission for more information and to access the abstract system. 

How was my institution added to an abstract submission that I am listed as a coauthor?

The abstract submitter provided the institution information for each author listed in the abstract submission. The submitter may correct the entry prior to the submission deadline. After the submission deadline, contact for corrections to the author’s information. See Abstract Guidelines and Submission for more information and to access the abstract system. 

Is it possible to submit a table as an image?

Yes, however, the image must conform to the guidelines listed for tables and figures. Tables may have a maximum of 8 columns and 8 rows, including subcategories. 

Can you submit a table comprising multiple lines within each row?

Yes, it is possible to have a table comprising of multiple lines within each row, however, it must conform to the guidelines listed for tables and figures. Tables may have a maximum of 8 columns and 8 rows, including subcategories. A table consisting of more than 8 lines (total) will not be permissible within the tables and figures guidelines. 

Do all authors need to approve the content of the abstract submission?

Yes, it is the responsibility of the abstract submitter to ensure that all coauthors have reviewed and approved the content of the abstract and their inclusion in the list of authors before the abstract is submitted. See the Abstract Guidelines page for more information. 

Will I receive a confirmation email notifying me that my abstract submission was complete?

Upon submission, a confirmation email is sent to the abstract submitter. All coauthors listed on the abstract are copied on the confirmation email. Confirmation emails are sent from If you have not received the email, please check your spam folder and add to your safe sender list. 

How can I make a change on my abstract or author list now that the submission period is closed?

Once the submission process ends, abstracts immediately enter the peer review and scoring process. Therefore, no changes can be made after the submission deadline, unless changes or clarification are specifically requested by the abstract review team. Updates and new data can be included in the presentation at CROI. 

Why was my abstract declined?

Common reasons for declining an abstract include the following: 

  • Submission application was not complete 
  • Subject matter is not appropriate for CROI 
  • Information is not new enough 
  • Abstract duplicates other submissions 
  • Data are not included or offer inadequate/insufficient support for conclusions 
  • Statistical evaluation is absent or inadequate 
  • Format does not follow guidelines (eg, section[s] missing, more than 1 graphic, table, or figure submitted) 
  • Submission is poorly written overall 
  • Background does not summarize the hypothesis 
  • Methodology is inadequate or insufficient to support conclusions 
  • Controls are absent or inadequate 
  • Summary of essential results is absent or inadequate 
  • Submission reports clinical trial data from unplanned analysis or incomplete or ongoing studies 

Why was my figure, table, or other graphic removed?

Inclusion of a figure, table, or other graphic must conform to the guidelines around length, size, complexity, and legibility. Elements that do not meet these guidelines are removed from consideration in the review process and, if the abstract is accepted, from inclusion in the eAbstract Book. Further information and common reasons for removal can be found here.

Process for Table or Figure Review 

Each figure, table, or other graphic was reviewed in a blinded fashion by a 3-person panel. For reviews without unanimous consensus, the table, figure, or other graphic was assessed by an additional reviewer from the Scientific Program Committee.  

Abstracts with a figure, table, or other graphic that was removed will still be reviewed and considered for presentation at CROI based on the text of the abstract.  

Does CROI accept abstracts with results “to be determined” or trials in progress?

Abstract submissions need to describe the precise findings of the study; promise of results “to be determined” or trials in progress are not acceptable. For more information, visit the Abstract Guidelines and Submission page. 

Does CROI accept work that has been previously published or publicly presented?

In general, CROI does not accept work that has been previously published or publicly presented, or that is scheduled to be published or presented prior to CROI. Consideration may be given to a previously presented submission if meaningful newer data or different analyses are included, or if the prior or anticipated presentation was or will be at a conference not focused on HIV-, viral hepatitis-, or SARS-CoV-2-related topics. Electronic publication ahead of print that has been peer-reviewed and made generally accessible to the public is considered publication. However, if the authors provide an explanation of new data that will be presented at CROI beyond the prepublication, the abstract will be considered for presentation. For more information, visit the Abstract Guidelines and Submission webpage. 

What are the copyright policy and embargo policies for abstracts?

The contents of CROI conference materials are protected by copyright. Permission to replicate or reproduce any part of a CROI abstract must be obtained from the CROI Conference Manager, the International Antiviral Society-USA (IAS-USA). Study data, figures, and presentation slides from a CROI abstract belong to the abstract author(s) and study sponsors as relevant. For more information, please submit a permission request form or email 

Visit Abstract Guidelines and Submission for information on copyright for abstracts submitted to CROI. Visit Embargo Policies And Press Release Policies for information on the embargo and public release of abstracts presented at CROI. 

When will the CROI Abstract eBook be available?

The CROI Abstract eBook is released to registered attendees on or around the first day of the conference. Abstracts are released to the public on the CROI website after they are presented at the Conference. For updates on the public release of abstracts, please visit the CROI website homepage.  

If a presenting author is not able to attend CROI in person, can an alternate presenter present on their behalf?

If exigent circumstances prevent the designated presenting author from attending the conference in person, a coauthor or colleague must be appointed to present the abstract in person at CROI. 

Please contact as soon as possible. If the new presenter is a coauthor, please provide their name. If the new presenter is a colleague, please provide their name, institution, city, country, and email address. The new presenter must register to attend CROI in person and disclose financial relationships with ineligible companies.