Table 1a.

Patient demographics and baseline characteristics in Qinghai cohort.

	All Cases(N = 10)	Mild(N = 2)	Moderate(N = 4)	Severe(N = 4)
Gender, n (%)
Male	1 (10%)	0 (0%)	0 (0%)	1 (25%)
Female	9 (90%)	2 (100%)	4 (100%)	3 (75%)
Age (years)
Mean ± SD	41.9 ± 16.64	31.5 ± 0.5	31 ± 2.55	58 ± 15.92
Median	33	31.5	31.5	58.5
Min: Max	27:80	31:32	27:34	35:80
Age group, n (%)
≤ 65 years	9 (90%)	2 (100%)	4 (100%)	3 (75%)
> 65 years	1 (10%)	0 (0%)	0 (0%)	1 (25%)
Vaccination to disease onset (days)
Mean ± SD	194.78 ± 88.54	245 ± 57	240 ± 77.62	101 ± 10.71
Median	170.5	245	278.5	99
Min: Max	89:302	188:302	107:296	89:115
Symptom onset to treatment (days)
Mean ± SD	5.8 ± 3.31	3.5 ± 1.5	3.75 ± 1.79	9 ± 2.45
Median	5	3.5	3.5	10
Min: Max	2:11	2:5	2:6	5:11

*The most severe stage experienced by patient was used as the diagnostic type (mild, moderate, severe).