Covid-19 has evolved into a pandemic affecting around 4 mio. individuals and killing three hundred thousand of patients up to now. In a first phase, for those infected mild or more severe symptoms evolve such as myalgias, fever, cough as well as taste and smell loss. A minority will progress in a second phase characterized by breathlessness, severe fatigue and exercise imcompetence requiring hospitalization in most such cases and in some intensive management including ventilation.

Monitoring Covid 19