FOSTER CITY, Calif. - Gilead Sciences, Inc. (Nasdaq: GILD) announced the company's upcoming contributions to the 18th European AIDS Conference (EACS 2021), taking place virtually and onsite in London from October 27-30. Forty-four studies from Gilead's HIV research and development programs will be presented, including data from the global, observational, real-world BICSTaR study, which along with Gilead's community-focused programs, reflect the company's ongoing focus and commitment to advancing scientific discovery and supporting the development and delivery of practical solutions that can help improve care for all people affected by HIV.

'We look forward to presenting research at EACS 2021 that could help inform clinical outcomes and support clinicians in the collective endeavor to help end the HIV epidemic,' said Frank Duff, MD, Senior Vice President, Virology Therapeutic Area Head, Gilead Sciences. 'In addition to helping create a world with no new HIV infections, we also strive to ensure the people living with HIV can realize long-term treatment success. This includes extending treatment success markers, which can lead to more holistic and patient-centered HIV care, in turn helping us better assess and address the evolving and unmet needs of people affected by the HIV epidemic.'

Gilead will present long-term safety and efficacy data evaluating outcomes in adults living with HIV who switched to Biktarvy (bictegravir 50 mg/emtricitabine 200 mg/tenofovir alafenamide 25 mg tablets, B/F/TAF) from boosted protease inhibitor-based regimens including in those with pre-existing resistance. The primary endpoint was at week 48; results of the open-label extension phase through a maximum of week 181 are slated for presentation at EACS 2021. The data further establish the robust and durable efficacy profile of Biktarvy as a treatment option for virologically suppressed people living with HIV with known resistance. The use of Biktarvy in individuals with known resistance to the components of Biktarvy is investigational.

Twelve-month data and a descriptive analysis of patient-reported outcomes from the ongoing BICSTaR Study, a global, observational, real-world study evaluating the effectiveness, safety, and tolerability of Biktarvy in treatment-naive and treatment-experienced people living with HIV, will be presented at the conference. As the population of persons living with HIV increases, the evaluation and management of comorbid conditions that may occur in an individual's life takes on a larger role in HIV clinical care. These findings may help inform a future paradigm of coordinated, patient-centered HIV care.

Additionally, at EACS 2021, Gilead will share new findings on long-acting HIV treatment strategies, as well as updates from the company's continued pursuit of a cure for HIV. Data will include subgroup and resistance analyses from the ongoing Phase 3 CAPELLA trial evaluating the antiviral activity of investigational lenacapavir administered subcutaneously every six months in combination with an optimized antiretroviral background regimen in people living with HIV who are heavily treatment-experienced with multi-drug resistant HIV-1 infection.

To further aid the development of a functional HIV cure, Gilead conducted a study using mathematical modelling and machine learning in a Phase 1b study to identify predictive immune biomarkers of HIV post-treatment controllers. HIV post-treatment controllers, a rare group of people who manage to sustain their viral load suppression after stopping antiretroviral therapy, have the potential to help us further research and understand possible ways to induce a similar response to treatment in a broader group of people living with HIV.

Beyond presenting new scientific data from the company's HIV research and development programs, Gilead will convene a symposium featuring community, clinical and health systems experts to discuss the ongoing impact of COVID-19 on the HIV cascade of care and lessons learned that can be applied in the future as we seek to accelerate the end of the HIV epidemic, work towards increased health equity, and prepare for future emerging viruses.

About Gilead Sciences

Gilead Sciences, Inc. is a biopharmaceutical company that has pursued and achieved breakthroughs in medicine for more than three decades, with the goal of creating a healthier world for all people. The company is committed to advancing innovative medicines to prevent and treat life-threatening diseases, including HIV, viral hepatitis and cancer.

For more than 30 years, Gilead has been a leading innovator in the field of HIV, driving advances in treatment, prevention and cure research. Gilead researchers have developed eleven HIV medications, including the first single-tablet regimen to treat HIV and the first once-daily oral antiretroviral tablet for pre-exposure prophylaxis (PrEP) to reduce the risk of acquiring HIV infection. These advances in medical research have helped to transform HIV into a preventable, chronic condition for millions of people.

Gilead is committed to continued scientific innovation to provide solutions for the evolving needs of people affected by HIV around the world. Through partnerships and collaborations, the company also aims to improve education, expand access and address barriers to care, with the goal of ending the HIV epidemic for everyone, everywhere.

Gilead operates in more than 35 countries worldwide, with headquarters in Foster City, California.

Forward-Looking Statements

This press release includes forward-looking statements within the meaning of the Private Securities Litigation Reform Act of 1995 that are subject to risks, uncertainties and other factors, including Gilead's ability to initiate, progress or complete clinical trials or studies within currently anticipated timelines or at all, including those involving Biktarvy, Descovy for PrEP, lenacapavir and vesatolimod; the possibility of unfavorable results from such ongoing and additional clinical trials, including those involving Biktarvy, Descovy for PrEP, lenacapavir and vesatolimod; the possibility that Gilead may make a strategic decision to discontinue development of lenacapavir and vesatolimod and as a result, these compounds may never be successfully commercialized; Gilead's ability to receive regulatory approvals in a timely manner or at all, including marketing approvals of lenacapavir and vesatolimod, and the risk that any such approvals, if granted, may have significant limitations on its use; and any assumptions underlying any of the foregoing. These and other risks, uncertainties and factors are described in detail in Gilead's Quarterly Report on Form 10-Q for the quarter ended June 30, 2021, as filed with the U.S. Securities and Exchange Commission. These risks, uncertainties and other factors could cause actual results to differ materially from those referred to in the forward-looking statements. All statements other than statements of historical fact are statements that could be deemed forward-looking statements. The reader is cautioned that any such forward-looking statements are not guarantees of future performance and is cautioned not to place undue reliance on these forward-looking statements. All forward-looking statements are based on information currently available to Gilead, and Gilead assumes no obligation and disclaims any intent to update any such forward-looking statements.

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