A Study on the Safety of an Investigational Chickenpox Vaccine, When Given to Healthy Children, 12 to 15 Months of Age

1 dose of investigational varicella vaccine administered subcutaneously.

1 dose of marketed varicella vaccine administered subcutaneously.

1 dose of measles, mumps, and rubella vaccine co-administered subcutaneously or intramuscularly.

1 dose of hepatitis A vaccine co-administered intramuscularly.

1 dose of 13-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

1 dose of 20-valent pneumococcal conjugate vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.

1 dose of 15-valent pneumococcal conjugate (Vaxneuvance) vaccine co-administered intramuscularly. In some countries PCV will only be administered depending on the availability, country's registration status and national recommendations for pneumococcal vaccination at the time of study conduct.