Explanation:

To launch a patient portal with contact tracing functionality as part of its Health Cloud implementation, a consultant should recommend Experience Cloud for Health Cloud license for the external patient users. This license allows patients to access an Experience Cloud site that is integrated with Health Cloud and provides features such as self-service appointment scheduling, provider search, contact tracing surveys, chat support, and more7. Experience Cloud for Health Cloud license also supports advanced sharing and customizable dashboards for patient users8. External Apps for Health Cloud, Customer Community for Health Cloud, or Customer Community Plus for Health Cloud are not licenses that can fulfill this requirement.