Long Covid could be much more frequent than it is thought to be. Few dwell on the great problem represented by the post covid syndrome. The virus often leaves important marks on our body, and those who recover face problems of various kinds: chronic fatigue, shortness of breath, dry cough, headache, cognitive difficulties.

On the duration and resolution of this syndrome, now recognized as a highly debilitating condition, there are still no great answers: for this reason it is always important to emphasize that contracting Covid, even in a not serious form, still means exposing oneself to long-term risks that are still not well codified by the scientific community. Guidelines and more tools are expected to best assist these patients.

Inclusion Criteria:

subjects with proven positivity to the molecular test for Sars-cov2 with demonstration of microbiological healing patients discharged from FPG or other hospital structures; or only contact in PS; or home management age: range 20-60 years Fatigue operationalized as an affirmative answer to item "7" (CES-D)

Exclusion Criteria:

Pharmacological therapies with possible interactions with the mechanisms / processes under study (e.g. antihypertensive drugs, cortisone drugs, NSAIDs, immunosuppressants, nitrates)