inclusion criteria: - age ≥18 years - study participants that have given informed consent before any study related procedures are performed, and received a copy of signed consent form - healthcare workers (nurses, doctors) employed and working at gesundheitsverbund - healthcare workers looking after confirmed covid-19 positive patients in a secondary care setting such as accident and emergency departments, wards, operating theatres, outpatient departments, high dependency unit or intensive care units

inclusion criteria: - age ≥18 years - study participants that have given informed consent before any study related procedures are performed, and received a copy of signed consent form - healthcare workers (nurses, doctors) employed and working at gesundheitsverbund - healthcare workers looking after confirmed covid-19 positive patients in a secondary care setting such as accident and emergency departments, wards, operating theatres, outpatient departments, high dependency unit or intensive care units