WHO Immunization Implementation Guide
0.2.0 - ci-build

WHO Immunization Implementation Guide, published by WHO. This guide is not an authorized publication; it is the continuous build for version 0.2.0 built by the FHIR (HL7® FHIR® Standard) CI Build. This version is based on the current content of https://github.com/WorldHealthOrganization/smart-immunizations/tree/main and changes regularly. See the Directory of published versions

PlanDefinition: IMMZ.D2.DT.Varicella.2 doses

Official URL: http://smart.who.int/immunizations/PlanDefinition/IMMZD2DTVaricella2Doses Version: 0.2.0
Draft as of 2025-11-25 Computable Name: IMMZD2DTVaricella2Doses

IMMZ.D2.DT.Varicella.2 doses Countries where varicella is an important public health burden could consider introducing varicella vaccination in the routine childhood immunization programme. However, resources should be sufficient to ensure reaching and sustaining vaccine coverage ≥ 80%. Decision-making on childhood varicella vaccination should also include consideration of the possible impact on herpes zoster. The number of doses recommended is dependent on the goal of the vaccination programme. One dose is sufficient to reduce mortality and severe morbidity from varicella but not to prevent limited virus circulation and outbreaks. Two doses have higher effectiveness and should therefore be recommended in countries where the programmatic goal is, in addition to decreasing mortality and severe morbidity, to further reduce the number of cases and outbreaks.

Id: IMMZD2DTVaricella2Doses
Url: IMMZ.D2.DT.Varicella.2 doses
Version: 0.2.0
Title: IMMZ.D2.DT.Varicella.2 doses
Status: draft
Type:

system: http://terminology.hl7.org/CodeSystem/plan-definition-type

code: eca-rule

Date: 2025-11-25 19:41:02+0000
Publisher: WHO
Description:

IMMZ.D2.DT.Varicella.2 doses Countries where varicella is an important public health burden could consider introducing varicella vaccination in the routine childhood immunization programme. However, resources should be sufficient to ensure reaching and sustaining vaccine coverage ≥ 80%. Decision-making on childhood varicella vaccination should also include consideration of the possible impact on herpes zoster. The number of doses recommended is dependent on the goal of the vaccination programme. One dose is sufficient to reduce mortality and severe morbidity from varicella but not to prevent limited virus circulation and outbreaks. Two doses have higher effectiveness and should therefore be recommended in countries where the programmatic goal is, in addition to decreasing mortality and severe morbidity, to further reduce the number of cases and outbreaks.
Knowledge Capability: computable
Related Artifacts:

References

  • ​

    WHO recommendations for routine immunization - summary tables (January 2025)
Libraries:
IMMZD2DTVaricella2DosesLogic
Actions:
Determine if the client is due for Varicella.: Determine if the client is due for Varicella vaccine according to the national immunization protocol. 2-dose schedule
If: Applicability: Client is due for varicella vaccination (Client is due for varicella vaccination)
Then: Definition: IMMZD2DTMR
Dynamic Values:
status: ('draft')
intent: ('proposal')
medication: (Concept { codes: { Code { system: 'http://smart.who.int/immunizations/CodeSystem/IMMZ.Z', code: 'DE22', display: 'Varicella-containing vaccines' } }, display: 'Varicella-containing vaccines' })
Check for Guidance for the patient regarding IMMZ.D2.DT.Varicella.2 doses.: Show Guidance for the patient regarding IMMZ.D2.DT.Varicella.2 doses.
If: Applicability: Has Guidance (Has Guidance)
Then: Definition: IMMZ.D2.DT.CR
Dynamic Values:
status: ('active')
payload.contentString: (Guidance)
category.coding: (Code { system: 'http://terminology.hl7.org/CodeSystem/communication-category', code: 'alert' })
priority: (Code { system: 'http://hl7.org/fhir/request-priority', code: 'routine' })