* patients who received zinc before the start of the protocol. * heart, liver, malignancies, or renal failure (estimated glomerular filtration rate ≤30 ml/min/1.73 m2); * mental disorders . * chronic dialysis. * hospitalisation in icu (use of respiratory or cardiovascular organ support (oxygen delivered by high-flow nasal cannula, noninvasive or invasive mechanical ventilation, or the use of vasopressors or inotropes). . * known hypersensitivity to zinc. * unsuitability for oral administration

* patients who received zinc before the start of the protocol. * heart, liver, malignancies, or renal failure (estimated glomerular filtration rate ≤30 ml/min/1.73 m2); * mental disorders . * chronic dialysis. * hospitalisation in icu (use of respiratory or cardiovascular organ support (oxygen delivered by high-flow nasal cannula, noninvasive or invasive mechanical ventilation, or the use of vasopressors or inotropes). . * known hypersensitivity to zinc. * unsuitability for oral administration

patients who received zinc before the start of the protocol. heart, liver, malignancies, or renal failure (estimated glomerular filtration rate ≤30 ml/min/1.73 m2); mental disorders . chronic dialysis. hospitalisation in icu (use of respiratory or cardiovascular organ support (oxygen delivered by high-flow nasal cannula, noninvasive or invasive mechanical ventilation, or the use of vasopressors or inotropes). . known hypersensitivity to zinc. unsuitability for oral administration

patients who received zinc before the start of the protocol. heart, liver, malignancies, or renal failure (estimated glomerular filtration rate ≤30 ml/min/1.73 m2); mental disorders . chronic dialysis. hospitalisation in icu (use of respiratory or cardiovascular organ support (oxygen delivered by high-flow nasal cannula, noninvasive or invasive mechanical ventilation, or the use of vasopressors or inotropes). . known hypersensitivity to zinc. unsuitability for oral administration

mental disorders . chronic dialysis. hospitalisation in icu . known hypersensitivity to zinc.

mental disorders . chronic dialysis. hospitalisation in icu . known hypersensitivity to zinc.