Connecticut Immunization Registry Focuses on Quality, Not Expansion

Some health agencies develop their own immunization registry system, while others purchase software from vendors. Neither choice is necessarily the "right" one—both can be fraught with difficulties, delays, and cost overruns.

The Connecticut registry begun in 1993 originally included only children in Hartford, but it was selected as the prototype for the state and expanded to include Medicaid managed care children in 1996.

Its success prompted the state to expand the registry again to include all children statewide, but it needed additional functionality, and a new vendor was selected.