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/123/merge and changes regularly. See the Directory of published versions
| Draft as of 2026-03-03 |
<PlanDefinition xmlns="http://hl7.org/fhir">
<id value="IMMZD18SVaricella1Dose"/>
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value="http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-recommendationdefinition"/>
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<text>
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<div xmlns="http://www.w3.org/1999/xhtml">
<div>
<table class="grid dict">
<tr>
<th scope="row"><b>Id: </b></th>
<td style="padding-left: 4px;">IMMZD18SVaricella1Dose</td>
</tr>
<tr>
<th scope="row"><b>Url: </b></th>
<td style="padding-left: 4px;"><a href="PlanDefinition-IMMZD18SVaricella1Dose.html">IMMZ.D18.S.Varicella.1-dose schedule</a></td>
</tr>
<tr>
<th scope="row"><b>Version: </b></th>
<td style="padding-left: 4px;">0.2.0</td>
</tr>
<tr>
<th scope="row"><b>Title: </b></th>
<td style="padding-left: 4px;">IMMZ.D18.S.Varicella.1-dose schedule</td>
</tr>
<tr>
<th scope="row"><b>Status: </b></th>
<td style="padding-left: 4px;">draft</td>
</tr>
<tr>
<th scope="row"><b>Type: </b></th>
<td style="padding-left: 4px;">
<p style="margin-bottom: 5px;">
<b>system: </b> <span><a href="http://terminology.hl7.org/7.0.1/CodeSystem-plan-definition-type.html">http://terminology.hl7.org/CodeSystem/plan-definition-type</a></span>
</p>
<p style="margin-bottom: 5px;">
<b>code: </b> <span>eca-rule</span>
</p>
</td>
</tr>
<tr>
<th scope="row"><b>Date: </b></th>
<td style="padding-left: 4px;">2026-03-03 13:07:11+0000</td>
</tr>
<tr>
<th scope="row"><b>Publisher: </b></th>
<td style="padding-left: 4px;">WHO</td>
</tr>
<tr>
<th scope="row"><b>Description: </b></th>
<td style="padding-left: 4px;"><div><p>IMMZ.D18.S.Varicella.1-dose schedule
1-dose schedule</p>
</div></td>
</tr>
<tr>
<th scope="row"><b>Knowledge Capability: </b></th>
<td style="padding-left: 4px;">
computable
</td>
</tr>
<tr>
<th scope="row"><b>Related Artifacts: </b></th>
<td style="padding-left: 4px;">
<p><b>References</b></p>
<ul>
<li><div><p>WHO recommendations for routine immunization - summary tables (January 2025)</p>
</div><br/><a href="null"/></li>
</ul>
</td>
</tr>
<tr>
<th scope="row"><b>Libraries: </b></th>
<td style="padding-left: 4px;">
<table class="grid-dict">
<tr>
<td><a href="Library-IMMZD18SVaricella1DoseLogic.html">IMMZD18SVaricella1DoseLogic</a></td>
</tr>
</table>
</td>
</tr>
<tr>
<th scope="row"><b>Actions: </b></th>
<td style="padding-left: 4px;">
<table class="grid-dict">
<tr>
<td>
<b> Varicella dose 1:</b> Provision of the varicella dose 1
Trigger event: Child's birth
Trigger pseudo:
Trigger date: "Date of birth"
Create condition: Depending on the goal of the vaccination programme, 1–2 doses should be given with the first dose administered at 12–18 months of age.
<br/>
<b>If:</b>
<i>Applicability:</i>
Varicella dose 1
<i>(Varicella dose 1)</i>
<br/>
<b>Then:</b> <i>Definition:</i> <a href="ActivityDefinition-IMMZD2DTCR.html">IMMZ.D2.DT.CR</a><br/>
<i>Dynamic Values:</i><br/>
status: <i>('active')</i>
<br/>
payload.contentString: <i>(Varicella dose 1 Create)</i>
<br/>
category.coding: <i>(Code { system: 'http://terminology.hl7.org/CodeSystem/communication-category', code: 'alert' })</i>
<br/>
priority: <i>(Code { system: 'http://hl7.org/fhir/request-priority', code: 'routine' })</i>
<br/>
</td>
</tr>
</table>
</td>
</tr>
</table>
</div>
</div>
</text>
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<extension
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<extension url="libraryName">
<valueString value="IMMZElements"/>
</extension>
<extension url="name">
<valueString value="Doses Administered to Patient"/>
</extension>
<extension url="statement">
<valueString
value="/**
* @dataElement All Doses Administered to Patient
*/
define "Doses Administered to Patient":
[Immunization] I
where I.status = 'completed'
and I.isSubpotent is not true"/>
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<valueString
value="/**
* @dataElement All Doses Administered to Patient
*/
define "Doses Administered to Patient":
Elements."Doses Administered to Patient" I
where I.occurrence.toInterval() same day or before Today"/>
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<extension url="libraryName">
<valueString value="IMMZD2DTVaricellaEncounterElements"/>
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<extension url="name">
<valueString value="Varicella Doses Administered to Patient"/>
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<extension url="statement">
<valueString
value="/*
@internal: Varicella containing Doses Administered to Patient
*/
define "Varicella Doses Administered to Patient":
Encounter."Doses Administered to Patient" I
where
I.vaccineCode in Concepts."Varicella-containing vaccines""/>
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<valueString
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<extension url="statement">
<valueString
value="/*
@internal: Varicella containing Doses Administered to Patient that are in the Primary series
*/
define "Varicella Primary Series Doses Administered to Patient":
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@internal: Number of Varicella Primary Series doses
*/
define "Number of Varicella Primary Series Doses Administered":
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<valueString value="IMMZD2DTVaricellaEncounterElements"/>
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<extension url="name">
<valueString
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<extension url="statement">
<valueString
value="/*
@input: No varicella primary series dose was administered
@pseudocode: Count of vaccines administered (where "Vaccine type" = "Varicella-containing vaccines" and "Type of dose" = "Primary series") = 0
@code: No varicella primary series dose was administered-129
@decision: IMMZ.D2.DT.Varicella.1 dose: 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.
*/
define "No varicella primary series dose was administered":
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<extension url="name">
<valueString
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<extension url="statement">
<valueString
value="/*
@input: One varicella primary series dose was administered
@pseudocode: Count of vaccines administered (where "Vaccine type" = "Varicella-containing vaccines" and "Type of dose" = "Primary series") = 1
@code: One varicella primary series dose was administered-129
@decision: IMMZ.D2.DT.Varicella.1 dose: 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.
@decision: 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.
*/
define "One varicella primary series dose was administered":
"Number of Varicella Primary Series Doses Administered" = 1"/>
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<valueString value="IMMZD18SVaricella1DoseLogic"/>
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@complete: One varicella dose from primary series was administered. The primary series has been completed
@pseudocode: "Completed the primary vaccination series" = TRUE (where "Vaccine type" = "Varicella-containing vaccines")
*/
define "One varicella dose from primary series was administered. The primary series has been completed":
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<extension url="name">
<valueString value="Varicella dose 1"/>
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value="/*
@output: Varicella dose 1
@description: Provision of the varicella dose 1
@trigger: Child's birth
@pseudo:
@triggerDate: "Date of birth"
*/
define "Varicella dose 1":
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<extension url="name">
<valueString value="Varicella dose 1 Due Date"/>
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@dynamicValue: Varicella dose 1 Due Date
@pseudocode: "Date of birth" + 12 months
*/
define "Varicella dose 1 Due Date":
if "Varicella dose 1" then Patient.birthDate + 12 months
else null"/>
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<extension url="name">
<valueString value="Varicella dose 1 Overdue"/>
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<valueString
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@dynamicValue: Varicella dose 1 Overdue
@pseudocode: "Date of birth" + 18 months
*/
define "Varicella dose 1 Overdue":
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else null"/>
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<extension url="libraryName">
<valueString value="IMMZD18SVaricella1DoseLogic"/>
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<extension url="name">
<valueString value="Varicella dose 1 Create"/>
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<extension url="statement">
<valueString
value="/*
@output: Varicella dose 1 Create
@create: Depending on the goal of the vaccination programme, 1–2 doses should be given with the first dose administered at 12–18 months of age.
*/
define "Varicella dose 1 Create":
if "Varicella dose 1"
then 'Depending on the goal of the vaccination programme, 1–2 doses should be given with the first dose administered at 12–18 months of age.' + '
Due Date: ' + ToString("Varicella dose 1 Due Date") + '
Overdue: ' + ToString("Varicella dose 1 Overdue")
else ''"/>
</extension>
<extension url="displaySequence">
<valueInteger value="11"/>
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<extension
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<extension url="libraryName">
<valueString value="IMMZCommon"/>
</extension>
<extension url="name">
<valueString value="seriesPrimary"/>
</extension>
<extension url="statement">
<valueString
value="/**
* @description: Gets the doses from the primary series
*/
define fluent function seriesPrimary(immunizations List<Immunization>):
immunizations I where
exists( I.protocolApplied pa where pa.series = 'Primary series' )"/>
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<valueInteger value="12"/>
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<extension url="libraryName">
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<extension url="name">
<valueString value="ToString"/>
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<extension url="statement">
<valueString
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}"/>
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<valueString value="ToDate"/>
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<name value="EffectiveDataRequirements"/>
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<display value="Library Encounter"/>
<resource
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<relatedArtifact>
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<display value="Value set Varicella-containing vaccines"/>
<resource
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<use value="out"/>
<min value="0"/>
<max value="1"/>
<type value="string"/>
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<parameter>
<name value="Varicella dose 1"/>
<use value="out"/>
<min value="0"/>
<max value="1"/>
<type value="boolean"/>
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<type value="Immunization"/>
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<mustSupport value="isSubpotent"/>
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<dataRequirement>
<type value="Immunization"/>
<profile
value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
<mustSupport value="status"/>
<mustSupport value="isSubpotent"/>
<mustSupport value="occurrence"/>
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<dataRequirement>
<type value="Immunization"/>
<profile
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<mustSupport value="status"/>
<mustSupport value="isSubpotent"/>
<mustSupport value="occurrence"/>
<mustSupport value="vaccineCode"/>
</dataRequirement>
<dataRequirement>
<type value="Patient"/>
<profile value="http://hl7.org/fhir/StructureDefinition/Patient"/>
</dataRequirement>
<dataRequirement>
<type value="Immunization"/>
<profile
value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
<mustSupport value="status"/>
<mustSupport value="isSubpotent"/>
<mustSupport value="occurrence"/>
<mustSupport value="vaccineCode"/>
</dataRequirement>
<dataRequirement>
<type value="Immunization"/>
<profile
value="http://hl7.org/fhir/StructureDefinition/Immunization"/>
<mustSupport value="status"/>
<mustSupport value="isSubpotent"/>
<mustSupport value="occurrence"/>
<mustSupport value="vaccineCode"/>
</dataRequirement>
</Library>
</contained>
<extension
url="http://hl7.org/fhir/uv/cpg/StructureDefinition/cpg-knowledgeCapability">
<valueCode value="computable"/>
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<valueCanonical value="#effective-data-requirements"/>
</extension>
<url
value="http://smart.who.int/immunizations/PlanDefinition/IMMZD18SVaricella1Dose"/>
<version value="0.2.0"/>
<name value="IMMZD18SVaricella1Dose"/>
<title value="IMMZ.D18.S.Varicella.1-dose schedule"/>
<type>
<coding>
<system
value="http://terminology.hl7.org/CodeSystem/plan-definition-type"/>
<code value="eca-rule"/>
</coding>
</type>
<status value="draft"/>
<experimental value="false"/>
<date value="2026-03-03T13:07:11+00:00"/>
<publisher value="WHO"/>
<contact>
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<telecom>
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</telecom>
</contact>
<description value="IMMZ.D18.S.Varicella.1-dose schedule
1-dose schedule"/>
<relatedArtifact>
<type value="citation"/>
<citation
value="WHO recommendations for routine immunization - summary tables (January 2025)"/>
</relatedArtifact>
<library
value="http://smart.who.int/immunizations/Library/IMMZD18SVaricella1DoseLogic"/>
<action>
<title value="Varicella dose 1"/>
<description
value="Provision of the varicella dose 1
Trigger event: Child's birth
Trigger pseudo:
Trigger date: "Date of birth"
Create condition: Depending on the goal of the vaccination programme, 1–2 doses should be given with the first dose administered at 12–18 months of age."/>
<condition>
<kind value="applicability"/>
<expression>
<description value="Varicella dose 1"/>
<language value="text/cql-identifier"/>
<expression value="Varicella dose 1"/>
</expression>
</condition>
<definitionCanonical
value="http://smart.who.int/immunizations/ActivityDefinition/IMMZD2DTCR"/>
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<path value="status"/>
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<language value="text/cql-expression"/>
<expression value="'active'"/>
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<dynamicValue>
<path value="payload.contentString"/>
<expression>
<language value="text/cql-identifier"/>
<expression value="Varicella dose 1 Create"/>
</expression>
</dynamicValue>
<dynamicValue>
<path value="category.coding"/>
<expression>
<description value="Category of communication"/>
<language value="text/cql-expression"/>
<expression
value="Code { system: 'http://terminology.hl7.org/CodeSystem/communication-category', code: 'alert' }"/>
</expression>
</dynamicValue>
<dynamicValue>
<path value="priority"/>
<expression>
<description value="Alert priority"/>
<language value="text/cql-expression"/>
<expression
value="Code { system: 'http://hl7.org/fhir/request-priority', code: 'routine' }"/>
</expression>
</dynamicValue>
</action>
</PlanDefinition>