Immunogenicity, Safety, Reactogenicity and Persistence of an Investigational Respiratory Syncytial Virus (RSV) Vaccine in Adults Aged 60 Years and Above

Inclusion Criteria: * Male or female participants ≥60 YOA at first vaccination, who live in the community (CD participants) or in a Long-term care facility (LTCF participants). * Participants who, in the opinion of the investigator, can and will comply with the requirements of the protocol. * Written or witnessed informed consent obtained from the participant prior to performance of any study specific procedure. * Participants who are medically stable in the opinion of the investigator at the time of first vaccination. Patients with chronic stable medical conditions with or without specific treatment, such as diabetes, hypertension or cardiac disease, are allowed to participate in this study if considered by the investigator as medically stable. Exclusion Criteria: Medical conditions * Any confirmed or suspected immunosuppressive or immunodeficient condition resulting from disease or immunosuppressive/cytotoxic therapy, based on medical history and physical examination. * History of any reaction or hypersensitivity likely to be exacerbated by any component of the vaccine. * Hypersensitivity to latex. * Serious or unstable chronic illness. * Recurrent or un-controlled neurological disorders or seizures. Participants with medically-controlled active or chronic neurological diseases can be enrolled in the study as per investigator assessment, provided that their condition will allow them to comply with the requirements of the protocol. * Significant underlying illness that i…