How schedules work: In the United States, CDC/ACIP provides recommendations but each state implements independently. In Canada, NACI provides a national framework but each province/territory administers its own program. This means schedules vary — sometimes significantly — by jurisdiction. Always verify against your local health authority.
🇺🇸 United States
50 states + DC each set their own school entry requirements. The CDC/ACIP recommends a standard childhood schedule, but state laws determine what's actually required for school and daycare.
View all 51 US jurisdictions →🇨🇦 Canada
13 provinces and territories each run their own immunization program. NACI (National Advisory Committee on Immunization) updates guidance ~4 times per year, but implementation varies.
View all 13 provinces & territories →Vaccines in the Registry
Every vaccine referenced in schedule timelines links to its full evidence page on VaccineDataNavigator.
About Schedule Comparisons
Vaccination schedules are not standardized globally, nationally, or even within countries. The United States currently has two competing schedules (CDC and AAP) due to ongoing litigation. Canadian provinces implement NACI guidance differently. The Vaccine Schedule & Exemption Navigator tracks the de facto schedule as published by each jurisdiction's health authority.
For the full global schedule matrix, see the Global Schedule Matrix — an interactive comparison of 37 countries' routine childhood schedules.