- Vertical integration lifetime immunization record.
- Horizontal integration incorporate with other health tracking for a subset of population.
- Provider-oriented (services performed by pediatricians, family practice, geriatricians, etc.).
- Disease oriented: integration with other disease surveillance, especially communicable disease, and emerging infections and electronic laboratory systems. Also might be an implementation under the Bioterrorism grants.

NYC System Integration
Examine trades-offs and challenges and the appeal of each model to different stakeholders.