Colorado Immunization Information System
Immunization records are confidential, personal medical information. The Colorado Immunization Information System (CIIS) is a lifelong immunization record tracking system under the Colorado Immunization Registry Act of 2007.
CIIS has signed agreements with all participating sites that are authorized to provide information to or access information from CIIS. CIIS and all people and entities that access immunization records are required to maintain the confidentiality of those records.