From: Clinical characteristics of coronavirus disease 2019 (COVID-19) in patients out of Wuhan from China: a case control study
Numbers of Concomitant Diseases
0
1
2
3
Mild COVID-19 (n = 9)
5 (55.56%)
3 (33.33%)
1 (11.11%)
Severe COVID-19 (n = 4)
2 (50%)