Those who have given up looking for work and sometimes those who are on government "retraining" programs are not officially counted among the unemployed even though they are not employed. The statistic also does not count the "underemployed", those working fewer hours than they would prefer or in a job that fails to make good use of their capabilities. In addition, those who are of working age but are currently in full-time education are usually not considered unemployed in government statistics. Traditional unemployed native societies who survive by gathering, hunting, herding, and farming in wilderness areas may or may not be counted in unemployment statistics. Long-term unemployment
Long-term unemployment (LTU) is defined in European Union statistics as unemployment lasting for longer than one year (while unemployment lasting over two years is defined as very long-term unemployment). The United States Bureau of Labor Statistics (BLS), which reports current long-term unemployment rate at 1.9 percent, defines this as unemployment lasting 27 weeks or longer. Long-term unemployment is a component of structural unemployment, which results in long-term unemployment existing in every social group, industry, occupation, and all levels of education.In 2015 the European Commission published recommendations on how to reduce long-term unemployment. These advised governments to:

encourage long-term unemployed people to register with an employment service;
provide each registered long-term unemployed person with an individual in-depth assessment to identify their needs and potential within 18 months;
offer a tailor-made job integration agreement (JIA) to all registered long-term unemployed within 18 months.
Lethal midline granuloma (LMG) is an historical term for a condition in which necrotic and highly destructive lesions develop progressively in the middle of the face, principally the nose and palate. Many cases presented with ulcerations in or perforations of the palate. LMG was thought to be a manifestation of three or four different diseases: the well-characterized disease of granulomatosis with polyangiitis, the ill-defined disorders of polymorphic reticulosis or mid-line malignant reticulosis, and an incompletely defined form of non-Hodgkins lymphoma. Subsequent studies found that the cells infiltrating the midline tissues in cases of lethal midline granuloma that were not clearly diagnosed as granulomatosis with polyangiitis were: a) infected by the Epstein-Barr virus and b) consisted of malignant lymphocytes, usually NK cells or, rarely, cytotoxic T cells. The disease is therefore now regarded as a NK/T cell malignancy, is grouped with other Epstein-Barr virus-associated lymphoproliferative diseases and is classified by the World Health Organization (2017 update) as a manifestation of the well-defined disease, extranodal NK/T-cell lymphoma, nasal type (ENKTCL-NT). ENKTCL-NT is a rare type of lymphoma that commonly involves the nasal cavity, oral cavity, and/or pharynx but less commonly can also involve the eye, larynx, lung, gastrointestinal tract, skin, and various other tissues. Patients presenting with highly localized midline facial disease fit the historical definition of lethal midline granuloma. These cases, unlike other cases ENKTCL-NT that have more widespread disease, often show no or relatively little progression of their disease over long periods of time.