If the applicant has not received any of the listed vaccinations and the vaccinations are age appropriate and medically appropriate, U.S. immigration agencies will say that the applicant has a “Class A condition” and is inadmissible. Some vaccines are expressly required by statute. Others are required because the Centers for Disease Control and Prevention (CDC) have determined they are in the interest of public health. This is the list in alphabetical order: Haemophilius influenza type B; Hepatitis A and B; Influenza; Meningococcal; Mumps, measles, rubella; Pertussis; Pneumococcal pneumonia; Polio; Rotavirus; Tetanus and diphtheria toxoids; Varicella.