The value set to instantiate this attribute should be drawn from a terminologically robust code system that consists of or contains concepts to support the definition of dates relevant to recommendations for future doses of vaccines. This value set is provided as a suggestive example.
Legenda: Type L=leaf, S=specializable, A=abstract, D=deprecated. NullFlavor OTH (other) suggests text in originalText. HL7 V3: NullFlavors to appear in @nullFlavor attribute instead of @code.