Learning Objectives for this Presentation:
By the end of this presentation, participants will be able to understand the benefits of IIS utilization in responding to a large patient recall.

Background:
Storage requirements for childhood vaccines include not exposing them to freezing temperatures. In November 2003, it was discovered that the vaccine-storage refrigerator temperatures in a large pediatric clinic were below 32 degrees between January 1, 2002 – November 22, 2003. Based on several factors, it was determined that DTaP was the only vaccine considered subpotent in this situation. Patients determined to have received subpotent DTaP vaccine were advised to return for reimmunization.

Objectives:
Illustrate how the IIS was used for a large patient recall of subpotent vaccine.

Methods:
IIS staff extracted vaccination and demographic data for children seen between January 1, 2002 – November 22, 2003. Parents of the children determined to have received 1+ DTaP dose were mailed a letter advising them to return their children to the clinic for reimmunization.

Results:
According to the state IIS, between January 1, 2002 – November 22, 2003, 3124 children were recalled after receiving 1+ dose of DTaP or TriHIBit vaccine. 1280 children received 1+ dose of DT-containing vaccine within 90 days after the reimmunization letter was mailed. IIS staff was able to coordinate with the clinic and generate the necessary information to conduct this patient recall in 8 days.

Conclusions:
Using the state IIS allowed for the effective identification of patients receiving subpotent DTaP vaccine and a timely patient recall action. 41% of children were reimmunized within 90 days. Due to the clinic's participation in the IIS and submission of their immunization data in an expeditious manner, the IIS was able to generate clinical and demographic data quickly and easily. The Oregon Immunization Program has subsequently developed program-wide policies regarding operational and technical considerations for recalls.