Phase 2b, Open-label, Multicenter, Rollover Study to Assess Antiviral Activity and Safety of Long-acting (LA) Cabotegravir (CAB) Plus LA Rilpivirine (RPV), Administered Every 2 Months (Q2M), in Human Immunodeficiency Virus (HIV)-Positive Participants From the LATTE Study

Inclusion Criteria

• Aged 18 years or older (or >=19 where required by local regulatory agencies), at the time of signing the informed consent.
• A female participant is eligible to participate if she is not pregnant (as confirmed by a negative urine human chorionic gonadotrophin [hCG] test at Day 1), not lactating, and at least with one of following conditions:

(a) Non-reproductive potential defined as: (i) Pre-menopausal females with one of the conditions as documented tubal ligation; Documented hysteroscopic tubal occlusion procedure with follow-up confirmation of bilateral tubal occlusion, Hysterectomy, Documented Bilateral Oophorectomy.

(ii) Postmenopausal defined as 12 months of spontaneous amenorrhea [in questionable cases a blood sample with simultaneous follicle stimulating hormone (FSH) and estradiol levels consistent with menopause (refer to laboratory reference ranges for confirmatory levels)]. Females on hormone replacement therapy (HRT) and whose menopausal status is in doubt will be required to use one of the highly effective contraception methods if they wish to continue their HRT during the study. Otherwise, they must discontinue HRT to allow confirmation of post-menopausal status prior to study enrolment.

(b) Reproductive potential and agrees to follow one of the options listed in the Modified List of Highly Effective Methods for Avoiding Pregnancy in Females of Reproductive Potential (FRP) from 30 days prior to the first dose of study medication, throughout the study, for at least 30 days after discontinuation of all oral study medications, and for at least 52 weeks after discontinuation of CAB LA and RPV LA.

• The investigator is responsible for ensuring that participants understand how to properly use the methods of contraception.
• Capable of giving signed informed consent.
• Must have been on oral CAB 30 mg plus RPV 25 mg regimen through at minimum Week 300 of the LATTE study as per LATTE protocol dosing requirements and until Day 1 of the POLAR study. Any disruptions in dosing during LATTE must be discussed with the Medical Monitor for a final determination of eligibility.
• Plasma HIV-1 RNA = 50 c/mL at Week 300 in LATTE, a single repeat to determine eligibility may be allowed ONLY after consultation with the medical monitor.

Exclusion Criteria

• During the last 6 months of participation in LATTE, consecutive (2 or more sequential) plasma HIV-1 RNA measurements >=50 c/mL.
• During the last 6 months of participation in LATTE, any HIV-1 RNA measurement >=200 c/mL.
• Any evidence of a current Center for Disease Control and Prevention (CDC) Stage 3 disease [CDC, 2014], except cutaneous Kaposi's sarcoma not requiring systemic therapy.
• Participants with moderate to severe hepatic impairment determined by Child-Pugh classification.
• Any pre-existing physical or mental condition (including substance use disorder) which, in the opinion of the Investigator, may interfere with the participant's ability to comply with the dosing schedule and/or protocol evaluations or which may compromise the safety of the participant.
• Participants determined by the Investigator to have a high risk of seizures, including participants with an unstable or poorly controlled seizure disorder. A participant with a prior history of seizure may be considered for enrolment if the Investigator believes the risk of seizure recurrence is low.
• Participants who, in the investigator's judgment, pose a significant suicide risk. Participant's recent history of suicidal behavior and/or suicidal ideation should be considered when evaluating for suicide risk.
• Participants has a tattoo or other dermatological condition overlying the gluteus region which may interfere with interpretation of injection site reactions.
• Evidence of Hepatitis B virus (HBV) infection based on the results of testing for Hepatitis B surface antigen (HBsAg), Hepatitis B core antibody (anti-HBc), Hepatitis B surface antibody (anti-HBs) and HBV DNA as follows