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CROI
Conference on Bacteriophages
RWHAP CLINICAL CONFERENCE
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Vivek Mutalik, PhD
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
Vance G. Fowler, MD
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
Victoria A. Johnson, MD
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
Vincent Calvez, MD, PhD
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
Victor G. Valcour, MD, PhD
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
Victoria A. Cargill, MD, MSCE
University of California San Francisco
Professor of Medicine, Emeritus
San Francisco, CA
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CROI
Conference on Bacteriophages
RWHAP CLINICAL CONFERENCE
Podcasts
Slides
Question of the Week
Guidelines
Contact
CME Courses
HIV In-Person and Virtual Courses
Current On-Demand Courses
About Courses
CME Webinars
Upcoming Webinars
Current On-Demand Webinars
MATE Act CME
About Webinars
Dialogues
Upcoming IAS–USA Dialogues: Emerging Infections and Health Threats
On-Demand Dialogues
About Dialogues
Topics In Antiviral Medicine
Current Issues for CME
Previous Issues
TAM
Policies and Practices
Permission Request Form
HIV Drug Resistance
HIV Drug Resistance Resources
HIV Drug Resistance Mutations Chart
Recent Webinars
Journal Articles
Fellow Resources
Resources for Fellows and Others New to the HIV Field
On-Demand Webinars for Fellows
IAS-USA Guidelines and Recommendations
On-Demand Webcasts
Research Collaborations
Additional Resources
About
Scientific Leadership Board
IAS-USA Leadership Award Recipients
Core Faculty
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Staff
CME
Funding Information
Careers
Website Policies
Discrimination and Harassment Policy
Governance
Suggestions and Recommendations from San Francisco Locals
Donate
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Practice Question of the Week
August 10, 2026: HIV Diagnostic Challenges in Individuals Taking Long-Acting Cabotegravir PrEP
The ImPrEP CAB (Implementation of Pre-exposure Prophylaxis of Injectable Cabotegravir) Brasil implementation study evaluated HIV diagnostic testing among individuals receiving long-acting cabotegravir (CAB-LA) for HIV preexposure prophylaxis (PrEP). Which of the following best describes the main finding among participants with inconclusive HIV serologic results?
A. Most participants with inconclusive serologic results had detectable HIV-1 RNA by ultrasensitive single-copy assay (SCA), confirming acute HIV infection
B. All participants with inconclusive serologic results had confirmed HIV infection by Geenius HIV 1/2 Supplemental Assay and were transitioned to antiretroviral therapy
C. No participant with inconclusive serologic results had detectable HIV-1 by ultrasensitive SCA
D. Inconclusive serologic results occurred primarily because HIV RNA testing was not incorporated into the study protocol after CAB-LA initiation
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