Simultaneous administration of live measles virus vaccine and smallpox vaccine.
D000917:Antibody Formation; D002675:Child, Preschool; D006801:Humans; D007223:Infant; D008457:Measles / Q000276:immunology*; D008458:Measles Vaccine; D009549:Nigeria; D012899:Smallpox / Q000276:immunology*; D012900:Smallpox Vaccine; D014611:Vaccination
D008458:Measles Vaccine; D012900:Smallpox Vaccine