The Conference on Retroviruses and Opportunistic Infections (CROI) was established in 1993 to provide a forum for basic scientists and clinical investigators to present, discuss, and critique their investigations into the epidemiology and biology of human retroviruses and associated diseases. The synergy of basic science and clinical investigation has been a major contributor to the success of the meeting. CROI has facilitated the presentation of important discoveries in the field, thereby accelerating progress in HIV and AIDS research. As always, the best and most consequential original research will define the science at virtual CROI 2021 (vCROI 2021), which will include research in HIV, hepatitis viruses, SARS-CoV-2, and other viral infections and their related conditions.

Abstracts are evaluated by the Scientific Program Committee and additional reviewers for the relevance of their topics, the rigor of their research, and the distinct contributions they make to the broad spectrum of study that CROI strives to provide each year. For more information on preparing abstracts, submitting them electronically, and submission deadlines, visit the Abstract Guidelines page.

Attendance at the conference is open to researchers and clinical educators actively involved in the study and management of HIV, other retroviruses, and related medical conditions. For registration information, visit: the Conference Registration page. Limited space is also available to members of the media whose work aligns with the scientific and educational aims of the conference. Media professionals interested in attending can find application and registration materials in the Conference Registration page

Live and on-demand sessions from CROI 2021 will be available to registered attendees during the conference. Thereafter, recordings of live and on-demand sessions will be available to nonregistrants only through a paid subscription. For more information, visit the CROI resources page.