CTWiZ logo for CT Immunization Information System

All About CT WiZ

CT WiZ is Connecticut’s secure web-based Immunization Information System (IIS) that:

  • Meets national standard requirements for effective tracking and administration of immunizations in a public health setting.

  • Maintains complete and accurate immunization records for patients vaccinated in Connecticut.

All personal information, including immunization status and dates of immunization of individuals, is kept confidential as required by Connecticut law. Only patients, parents/legal guardians, doctors, and other health care workers have access to information on CT WiZ.