A Study of Investigational RSV/hMPV Combination and Investigational hMPV Vaccines in Younger and Older Adults

History of any reaction or hypersensitivity likely to be exacerbated by any component of the study intervention(s).

Any medical condition that in the judgment of the investigator would make IM injection unsafe.

Any confirmed or suspected immunosuppressive or immunodeficient condition resulting from disease (e.g., current malignancy, HIV) or immunosuppressive/cytotoxic therapy (e.g., medication used during cancer chemotherapy, organ transplantation, or to treat autoimmune disorders), based on medical history and physical examination (no laboratory testing required).

Acute or unstable chronic pulmonary, cardiovascular, hepatic, or renal functional abnormality, as determined by physical examination and medical history.