Characteristic	Medical History of COVID-19 patients					p-value2
	Overall, N = 4261	Asymptomatic, N = 241	Mild, N = 2831	Moderate, N = 901	(Very) severe, N = 291
No past medical history	232	13/232 (5.6%)	173/232 (75%)	39/232 (17%)	7/232 (3.0%)	<0.001
Asthma	27	0/27 (0%)	7/27 (26%)	15/27 (56%)	5/27 (19%)	<0.001
Other Lung Disease	27	0/27 (0%)	9/27 (33%)	12/27 (44%)	6/27 (22%)	<0.001
Diabetes Mellitus	3	0/3 (0%)	1/3 (33%)	1/3 (33%)	1/3 (33%)	0.2
Immunodeficiency	15	2/15 (13%)	8/15 (53%)	3/15 (20%)	2/15 (13%)	0.2
Congenital Heart Disease	13	0/13 (0%)	5/13 (38%)	6/13 (46%)	2/13 (15%)	0.045
Abnormal Pulmonary Function Test	4	0/4 (0%)	1/4 (25%)	2/4 (50%)	1/4 (25%)	0.11
Abnormal (cognitive) development	45	3/45 (6.7%)	15/45 (33%)	17/45 (38%)	10/45 (22%)	<0.001
Other	73	4/73 (5.5%)	56/73 (77%)	9/73 (12%)	4/73 (5.5%)	0.2
1 n/N (%)
2 Fisher's exact test