Men or women older than 18 years Participants who are willing and able to comply with study requirements, including all scheduled visits, vaccinations, and tests Individuals who received two doses of the SARS-CoV-2 vaccine with each platform within 4 to 9 months prior to the screening visit Healthy adults or adults with stable medical conditions

Men or women older than 18 years Participants who are willing and able to comply with study requirements, including all scheduled visits, vaccinations, and tests Individuals who received two doses of the SARS-CoV-2 vaccine with each platform within 4 to 9 months prior to the screening visit Healthy adults or adults with stable medical conditions