Table 1.

Demographics and clinical characteristics of 8 hospitalized preschool children infected with COVID-19

Characteristic	Patients
	1	2	3	4	5	6	7	8
Demographics
Sex	Male	Female	Male	Female	Female	Female	Male	Female
Age	1y	2 y	3 y	3 y	4 y	5 y	1y	2y
Time from onset to initial diagnosis	5d	7d	10d	8d	7d	6d	9d	1d
Symptoms at onset
Fever	Yes	Yes	Yes	Yes	No	No	Yes	Yes
Cough	Yes	Yes	Yes	Yes	No	Yes	Yes	Yes
Runny nose	No	Yes	No	Yes	No	No	No	Yes
Epidemiologic history
Exposure to Wuhan	Yes	No	No	No	No	No	Yes	No
No. of family members infected	0	0	0	0	0	1 (mother)	0	1 (mother)
Laboratory examination
WBC (109/L)	6.66	9.68	10.75 ↑	4.93	7.12	6.45	8.31	7.28
Neutrophils (109/L)	2.92	3.31	3.85	2.83	3.45	2.97	7.58	3.02
Neutrophils (%)	43.8 ↓	34.3 ↓	35.9 ↓	57.4	33.2 ↓	59.2	83.2 ↑	54.3
Lymphocyte (109/L)	3.15	5.6 ↑	6.22 ↑	1.66	2.12	3.25	1.78	1.97
Lymphocyte (%)	47.4 ↑	57.8 ↑	57.9 ↑	33.6	48.2 ↑	31.8	16.5 ↓	59.2 ↑
Eosinophils (109/L)	0.12	0.14	0.13	0.09	0.08	0.10	0.12	0.17
Eosinophils (%)	1.8	1.4	1.1	1.8	1.3	1.5	1.6	1.4
Basophils (109/L)	0.04	0.02	0.02	0.01	0.05	0.02	0.06	0.01
Basophils (%)	0.6	0.2	0.2	0.3	0.2	0.4	0.4	0.3
ESR (mm/H)	8	12	5	11	7	6	9	12
CRP (mg/L)	0.75	0.5	0.85	32.1 ↑	0.65	1.22	0.89	1.03
Past medical history	Surgery a	no	no	no	no	no	Surgery b	no
Coexisting infection	no	no	no	no	no	no	Mycoplasma pneumonia	no
Clinical type	Moderate	Moderate	Moderate	Moderate	Mild	Mild	Critical	Moderate

↑ indicates an increase and ↓ indicates a decrease in these laboratory examination indexes. ^a patient 1 had a past medical history of surgery for nephroblastoma; ^b patient 7 had a past medical history of surgery for nephroblastoma congenital heart disease

Abbreviations: WBC white blood cell, ESR Erythrocyte sedimentation rate, CRP C-reactive protein