[Measures to lower the morbidity of a group that is frequently and protractedly ill].
D000041:Absenteeism; D000553:Ambulatory Care; D002908:Chronic Disease; D006801:Humans; D009017:Morbidity; D009784:Occupational Diseases / Q000517:prevention & control; D012008:Recurrence; D014586:USSR
O meropriiatiiakh po snizheniiu zabolevaemosti gruppy chasto i dlitel'no boleiushchikh.