This code system http://hl7.org/fhir/us/immds/CodeSystem/ForecastStatus defines the following codes:

Code	Display	Definition
complete	Complete	The patient series is complete
notComplete	Not Complete	The patient series is incomplete
notRecommended	Not Recommended	The patient is not recommended
immune	Immune	The patient is considered immune and therefore does not require vaccination
contraindicated	Contraindicated	The patient is contraindicated for the vaccine
agedOut	Aged Out	The patient is past the recommendated maximum age for vaccination
conditional	Conditional	The patient may be recommended for vaccination depending on other attributes