The Role of Combination Vaccines: Streamlining Immunization Schedules As part of the strategy to sustain high global immunization coverage, the use of combination vaccines that include the Inactivated Polio Vaccine (IPV) component is growing, especially in routine childhood schedules. These vaccines combine IPV with protection against several other common childhood diseases, such as Diphtheria, Tetanus, and Pertussis (DTaP), and sometimes Hepatitis B and...