A Study to Learn About a Study Medicine Called Ibuzatrelvir in Adult and Adolescent Patients With COVID-19 Who Are Not Hospitalized But Are at Risk For Severe Disease

A Study to Learn About the Study Medicine Ibuzatrelvir in Adults With COVID-19 Who Are Severely Immunocompromised

A Study to Learn About the Safety of an Expanded Pneumococcal Vaccine in Healthy Infants

A Study to Learn About How a New Pneumococcal Vaccine Works in Infants.

A Study to Learn About How 20-Valent Pneumococcal Conjugate Vaccine Works in a Real-world Setting

A Study of How Ibuzatrelvir is Taken up Into the Blood of Healthy Adults After Taking Different Tablets of Ibuzatrelvir

A Study to Learn More About Prevenar 20 Once it is Out in the Korean Market

A Study to Learn About the Study Medicine Zavicefta After it is Released Into the Markets in Korea