As demonstrated by a study conducted by Ai et al., including 1014 suspect COVID-19 cases who underwent multiple RT-PCR testing and chest-CT, overall 88% of patients had positive CT scans while RT-PCR positivity was found only in 59% of all cases. Also, as reported by Yang et al, the total positive
It has been reported that nearly half of the patients who are hospitalized for Covid-19 pneumonia have on admission old age or comorbidities.
In particular, hypertension was present in 30% of the cases, diabetes in 19%, coronary heart disease in 8% and chronic obstructive lung disease in 3% of the