---
schema_version: "1"
id: 0707a178382e47e764ed8e85a9f3fc53df63e166c928457779a85a1139427a3f
title: Set up Marketing Cloud Engagement to Send Emails to Vaccine Eligibility Recipients
collection: admin
version: current
locale: en-us
portal_url: https://docs.salesforce.com/admin/current/en-us/service/264-0-0/vaccine_packages_send_email_mc.md
canonical_url: https://help.salesforce.com/s/articleView?id=service.vaccine_packages_send_email_mc.htm&release=264.0.0&type=5
source_site: help.salesforce.com
content_type: documentation
content_hash: 7258faeb996af7a77ce733f134b00f83bb11b78099125534cd38841b934dc32f
description: Prepare and send emails to recipients using Content Builder and Journey Builder in Marketing Cloud Engagement.
products:
  - Salesforce Platform
release: "264"
---
# Set up Marketing Cloud Engagement to Send Emails to Vaccine Eligibility Recipients

Prepare and send emails to recipients using Content Builder and Journey Builder in Marketing Cloud Engagement.

### Required Editions

<table class="slds-table slds-table_bordered slds-max-medium-table_stacked slds-m-bottom_small edition"><colgroup><col></colgroup><tbody><tr class=""><td class="slds-cell-wrap" style="vertical-align:top;">Available in: <strong>Enterprise</strong> and <strong>Unlimited</strong> editions.</td></tr></tbody></table>

1. Follow the steps in [Create a Transactional Send Journey](https://help.salesforce.com/articleView?id=mktg.mc_jb_create_transactional_journey.htm&type=5&language=en_US).
    1. Save the Event Definition Key that you enter in step 5—you’ll use it later.
    2. Create a data extension from the template `TriggeredSendDataExtension`.
2. Create a request using the `AsyncSendEmails` Apex class. (It’s part of the Vaccine Eligibility Form and Updates package.)
    1. Enter the Event Definition Key as the value of the DEFINITION\_KEY variable.
    2. Add whatever personal attributes you added to the data extension as fields in the `RecipientAttributes` class.
    3. Add whatever shared attributes you added to the data extension as fields in the `Attributes` class.
    4. If you support multiple languages, add logic that sends emails based on the language the recipient selected for the form. This requires translating the emails first
    5. Uncomment the call to `sendEmails()` in the `AsyncPostRegProcessor` Apex class. (It’s part of the Vaccine Eligibility Form and Updates package.)
    6. The `AsyncPostRegProcessor` Apex class contains a function called `isLeadEligible`. This is where you can set custom logic for eligibility in order to determine which recipients receive the message.

#### See Also

- [Marketing Cloud Engagement API: Send an Email to Multiple Recipients](https://developer.salesforce.com/docs/atlas.en-us.mc-apis.meta/mc-apis/sendMessageMultipleRecipients.htm)