Inclusion Criteria:  Patient, male or female, over 18 years old Admitted to the emergency department of the Clermont-Ferrand University Hospital for a medical reason, Classified as FRENCH II or III by the nurse organizer of the reception management Necessity of clinical observation in the Short Term Hospitalization Unit for final orientation decision Requires a blood test upon arrival in the emergency department Able to give informed non-opposition to participate in the research. Affiliation to a Social Security system  Exclusion Criteria:  Patient under guardianship or curatorship Pregnant and breast feeding woman Patient admitted for psychiatric pathology Patient with a limitation of therapeutics Refusal to participate Patient hospitalized because of a particular social context