GlaxoSmithKline
The aim of this study is to evaluate the safety, reactogenicity, and immune response of the different formulations of the investigational RSV/hMPV combination vaccine and investigational hMPV vaccine in younger and older adults.
Inclusion criteria: Participants are eligible to be included in the study only if all of the following criteria apply: * Written informed consent obtained from the participant prior to performance of any study-specific procedure. * Participants who can and will comply with the requirements of the protocol (e.g., completion of the eDiary, return for follow-up visits, ability to access and utilize a phone or other electronic communications). * Body Mass Index (BMI) between 18 kg/m\^2 and 33 kg/m\^2, inclusive. Specific inclusion criteria for OA * A male or female between and including, 60 to…
RSV/hMPV\_V low dose vaccine administered intramuscularly.
RSV/hMPV\_V medium dose vaccine administered intramuscularly.
RSV/hMPV\_V high dose vaccine administered intramuscularly.
RSV/hMPV\_W low dose vaccine administered intramuscularly.
RSV/hMPV\_W medium dose vaccine administered intramuscularly.
RSV/hMPV\_W high dose vaccine administered intramuscularly.
RSV/hMPV\_X low dose vaccine administered intramuscularly.
RSV/hMPV\_X medium dose vaccine administered intramuscularly.
RSV/hMPV\_X high dose vaccine administered intramuscularly.
hMPV\_Y low dose vaccine administered intramuscularly.
hMPV\_Y medium dose vaccine administered intramuscularly.
hMPV\_Y high dose vaccine administered intramuscularly.
hMPV\_Z low dose vaccine administered intramuscularly.
hMPV\_Z medium dose vaccine administered intramuscularly.
hMPV\_Z high dose vaccine administered intramuscularly.
Control vaccine administered intramuscularly.
Placebo administered intramuscularly.