Inclusion criteria:

- Participants 18 years of age or older.

- Participants who have received a COVID-19 vaccine containing Omicron KP.2 >6 months
(>175 days) prior to enrollment in the study and have not received any other
COVID-19 vaccine or had physician-confirmed COVID-19 disease since this vaccination
through to enrollment in the study.

- Participants 18 through 64 years of age should have at least 1 underlying medical
condition that increases their risk of severe COVID-19. The following list of
conditions have been developed utilizing conditions listed by the CDC and are deemed
to increase the risk of developing severe COVID-19 disease in infected participants:

- Asthma

- Diabetes mellitus type I

- Diabetes mellitus type II

- Heart conditions (eg. previous coronary artery disease or heart failure but
excluding cardiomyopathy, myocarditis and pericarditis)

- HIV

- Mental health conditions limited to mood disorders, including depression.

- Parkinson disease

- Obesity (BMI ≥30)

- Smoking, current or former The medical conditions mentioned above must have
remained stable for at least 6 weeks prior to enrollment.

Exclusion Criteria:

- History of severe adverse reaction associated with a vaccine and/or severe allergic
reaction (eg, anaphylaxis) to any component of the study intervention(s).

- History of myocarditis or pericarditis.

Refer to the study contact for further eligibility details.