TRIUMPH is a prospective, non-interventional observational study on the use of the fixdose combination TRIUMEQ (Dolutegravir/Abacavir/Lamivudine) and the respective monitoring measures in the practice of HIV care in Germany. The primary study objective is a descriptive report of the incidence of therapeutic monitoring measures in HIV-infected patients under TRIUMEQ therapy in everyday routine practice in Germany. The study is designed to enroll approximately 400 patients. There are no protocol-mandated visits or procedures associated with the study. Each patient is expected to participate for a maximum of 3 years or until premature discontinuation (i.e., discontinuation of TRIUMEQ, due to death, withdrawal of consent, lost to follow-up. TRIUMEQ is a registered trademark of the ViiV Healthcare group of companies.