A Study to Evaluate Blood Levels of Bepirovirsen in Adult Participants With Severe or Moderate Kidney Disease

Inclusion Criteria: * Age 18 to 80 years, inclusive * Body weight greater than or equal to 50 kilograms (kg) and body mass index (BMI) within the range 19 to 40 kilograms per square meter (kg/m\^2). * Males and females may participate. Female participants must not be pregnant or breastfeeding, and must be of non-childbearing potential, or agree to use a highly effective method of contraception. * Capable of giving signed informed consent Additional inclusion criteria for renal impairment groups (Group 1 and Group 2) * Severe renal impairment \[estimated glomerular filtration rate (eGFR) adjusted for actual body surface area (BSA) less than 30 milliliters per minute (ml/min); Group 1\] or moderate renal impairment \[eGFR adjusted for actual BSA between 30 and 59 ml/min; Group 2\], from any cause other than vasculitis or glomerulonephritis Additional inclusion criteria for healthy control participants with normal renal function (Group 3) * Healthy, based on medical evaluation including medical history, physical examination, laboratory tests, and electrocardiogram (ECG). * Normal renal function (eGFR adjusted for actual BSA greater than or equal to 90 ml/min) Exclusion Criteria: * Any medical condition that could affect the absorption, metabolism, or elimination of drugs, increase the risk of taking part in the study, or interfere with interpretation of the study data. * History of vasculitis or any type of glomerulonephritis * Use of creatine-containing supplements within 30…