A Study on the Immune Response and Safety of an RSV Vaccine When Given to Adults 18 Years of Age and Above Who Received Lung or Kidney Transplant and Are at an Increased Risk of Respiratory Syncytial Virus Lower Respiratory Tract Disease and Compared to Healthy Adults 50 Years of Age and Above

Inclusion Criteria: * Participants and/or participant's parent(s)/LAR(s) who, in the opinion of the investigator, can and will comply with the requirements of the protocol. * Participants living in the general community or in an assisted-living facility that provides minimal assistance can be enrolled, such that the participant is primarily responsible for self-care and activities of daily living. * Written or witnessed informed consent obtained from the participant/participant's parent(s)/LAR(s) (participant must be able to understand the informed consent) prior to performance of any study-specific procedure. * Female participants of nonchildbearing potential may be enrolled in the study. Non-childbearing potential is defined as hysterectomy, bilateral oophorectomy, bilateral salpingectomy, and post-menopause. * Female participants of childbearing potential may be enrolled in the study if the participant has practiced adequate contraception from 1 month prior to study intervention administration and agreed to continue adequate contraception until study end for this study, and has a negative pregnancy test on the day of and prior to study intervention administration. Specific inclusion criteria for renal/lung transplant patients: * A male or female, \>=18 YoA at the time of signing the Informed consent form (ICF) or Informed assent form (IAF). * Written informed assent obtained from the participant (participant must be able to understand the informed assent) if he/she is l…