MedVir for “Virtual Medicine” is an outstanding medical decision support expert solution. This unique artificial intelligence system based on Fuzzy Logic, is an intelligent medical system modeled on the reasoning of an emergency physician. Its role is to assess the patient’s condition by asking questions. Powered by over 30 years of research (field medicine and learned society), based on evidence-based medicine, this artificial intelligence system meets 3 needs: assess the seriousness of a condition, propose diagnostic hypotheses & guidance • MedVir Pre-Diag covers all symptoms, all speciality, all common & urgent diseases + 31 Rare diseases. Or assess the risks presented by a person linked to behavior, habits, work type, age & sex.. • MedVir Prev: assesses 45 risk factors and 60 pathologies. Finally inform the patient through a popularized encyclopedic database. • MedVir Wiki: 5,300 subjects (1350 illnesses), ie 70,000 pages of documents. In conclusion, MedVir provides: • A limited number of diagnostic hypotheses • The assessment of the seriousness of the situation (CCMU scale), • A Medical guidance (what to do, OTC drugs, explanations, etc. ) • An encyclopedic explanation for all the considered diagnoses. • An automatic anamnesis report, storable, printable, shareable, integrable. MedVir is both for patients, and for healthcare professionals (nurse, doctor, pharmacist, paramedic, etc.). MedVir is in SAS mode, easily interoperable, available on any medium (computer, smartphone, tablets, etc.). All the data are anonymous, unambiguously stored and searchable, for real time epidemiology. MedVir is in: French, English, Italian, Spanish, Brazilian. MedVir is a Class I Medical Device since 2017, designed & rigorously controlled by physicians with demonstrated reliability. Clinical study on real cases show that MedVir is 87% congruent with the final diagnosis given by the hospital after examinations. MEDVIR: universal help to care access and medical decision support.