Material available through,, the CROI Webcast site(s), CROI mobile app(s), CROI virtual conference platforms, and any other vehicles through which IAS-USA or the CROI Foundation distribute CROI materials (some of which may be protected by copyright or trademark) are the property of the CROI Foundation, IAS-USA, and their licensors. For more details and permissions requests, see Website Policies and Copyright (


Seattle, Washington | February 19-22, 2023


The CROI 2023 Program Guide includes abstract titles and author listing as submitted by the authors prior to CROI. Generally, the final program, including scientific abstract presentation titles, is published on the CROI website 1 week before the conference. Abstracts are available to registered attendees at the start of CROI and made publically available after the conference. Please check this page for updates, as more information will be released as it becomes available.

CROI conference materials (including, but not limited to, the CROI Program Guide, Abstract eBook, electronic posters, CROI logo, etc) are protected by copyright. Any part of CROI materials (such as an abstract as formatted in the CROI Abstract eBook or poster as presented in the Platform) cannot be published without prior CROI approval and approval of the authors. Permission to replicate or reproduce these elements must be obtained from the CROI Conference Manager, the International Antiviral Society-USA (IAS-USA). However, study data are the property of the author(s) and study sponsors as relevant. For more information, please email

COVID Policies

For the health and safety of CROI attendees, staff, and surrounding communities, all attendees must be appropriately vaccinated.

Per the World Health Organization guidelines, a fully vaccinated individual is 2 weeks or more post-initial vaccination series and may also receive a recommended booster dose after 4 to 6 months.

Per the Center for Disease Control guidelines, you are up to date when you have completed a COVID-19 vaccine primary series and gotten the most recent booster dose recommended for you by the CDC.

  • If you have completed your primary series – but are not yet eligible for a booster – you are considered up to date.
  • If you become ill with COVID-19 after you received all vaccine doses recommend for you, you are also considered up to date. You do not need to be revaccinated or receive an additional booster.

All on-site conference attendees must verify their vaccination status with conference organizers, prior to departing for the CROI Conference via the CROI 2023 CrowdPass Site, provided in pre-conference communication. Visit the information desk at registration for any questions.

To accommodate any attendee who does not meet the vaccine requirement we will convert your registration to virtual attendee via the Conference Platform.

All conference participants must wear a high-quality mask at all times (eg, N95, KN95, or KF94) while in the meeting room and other public spaces. Please be conscious of physical distancing and airflow when lowering your mask to eat or drink.

Child Care

Out of respect for the presenters and conference attendees, children are not permitted in meeting rooms, including the poster area. If you require child care services, you may refer to the following resources suggested by local hosts. You may also contact the concierge of your hotel.