Vaccine Preventable Disease Reference Set

On the Terminology Gateway, there is a subset titled “VaccinePreventableDiseaseCode”. Now that there is a Communicable Diseases and Conditions subset, "CommunicableDiseaseConditionCode", the two could get out of sync. Could the two questions below be discussed on a Public Health Surveillance Community call?

1. Should the VaccinePreventableDiseaseCode be retired?
2. If the VaccinePreventableDiseaseCode subset should continue to be separate, should it be constrained to be a strict subset of the CommunicableDiseaseConditionCode subset, to ensure the two subsets always remain aligned?

Thanks,
Mike