Table 1.

Status of jurisdictional IIS data exchange at eight VSD sites – August 2021.

VSD Site	Health System (enrollment1)	IIS	Send data (to IIS)	Receive data (from IIS)2		Integrate data into VSD data3
				COVID-19 Vaccines	Other Vaccines3	COVID-19 Vaccines	Other Vaccines4
DH	Denver Health (179 K)	CIIS	All data	Automated	Automated	All data	All data
HP	HealthPartners (473 K)	MIIC	All data	Automated	Automated	All data	All data*
		WIR	All data	Trigger-based*	Trigger-based*	Reconciled data*	Reconciled data
KPCO	Kaiser Permanente Colorado (471 K)	CIIS	All data	Trigger-based*	Trigger-based*	All data	All data
KPNW	Kaiser Permanente Northwest (554 K)	ALERT IIS	All data	Trigger-based	Trigger-based	All data	All data
		WA IIS	All data	Trigger-based	Trigger-based	All data	All data
KPWA	Kaiser Permanente Washington (792 K)	WA IIS	All data	Automated	Automated	All data	All data
MFC	Marshfield Clinic (172 K)	WIR	All data	Automated	Automated	All data	All data
KPNC	Kaiser Permanente Northern California (4.2 M)	CAIR2	All data	Automated	Trigger-based	All data	Reconciled data
KPSC	Kaiser Permanente Southern California (4.5 M)	CAIR2	All data	Automated	Trigger-based	All data	Reconciled data

1 Enrollment represents total number of enrolled health plan members in 2021

2 Sites indicated how the data from IIS were received by the health system (Automated vs. Trigger-based, defined below).

Automated: IIS data on all health system members are shared on a routinized and automated batched basis (typically daily, weekly, or monthly)

Trigger-based: Specific healthcare events (e.g., ambulatory visits, scheduling visits, birthdays, etc.) will act as a trigger where a request for immunization data is pushed out to the IIS, from the health system, and all relevant immunization data is returned and made available in the EHR.

Trigger-based*: The asterisk denotes health system efforts are in progress to transition to an automated batched transfer of data.

3 Sites indicated whether IIS data are integrated into the VSD data (All data vs. Reconciled data, defined below.)

4 Other Vaccines refers to all vaccination data, other than COVID-19 vaccines.

All data: All IIS data received by the health system are available for use in VSD research.

All data*: The asterisk denotes vaccine data are available and in the process of being added.

Reconciled data: Only reconciled data (data that has been reviewed and accepted by a provider, manually or as part of a batched reconciliation) is made available for use in VSD research.

Reconciled data*: The asterisk denotes health system efforts are in progress to eliminate the need for individual reconciliation of the vaccine record before being available for use in VSD research.

CIIS: Colorado Immunization Information System

MIIC: Minnesota Immunization Information Connection

ALERT IIS: ALERT Immunization Information System (Oregon)

WAIIS: Washington Immunization Information System

WIR: Wisconsin Immunization Registry

CAIR: California Immunization Registry