Table 1.

Characteristics of the included studies on COVID-19, 2020 [7], [16], [17], [18], [19], [20], [21], [22], [23], [24], [25], [26], [27], [28], [29], [30], [31], [32], [33], [34], [35], [36], [37], [38], [39], [40], [41], [42], [43], [44], [45], [46].

Authors	Country	Publication year	Sample size	Sex (male)	Age
Feng et al. [16]	China	2020	15	5	4–14 years
Wang et al. [17]	China	2020	31	15	1 month to 7 years
Zhou et al. [18]	China	2020	9	-	0–3 years
Tan et al. [19]	China	2020	10	3	1–12 years
Qiu et al. [20]	China	2020	36	23	0–16 years
Tagarro et al. [21]	Spain	2020	41	18	< 18 years
Tongqiang et al. [22]	China	2020	3	3	6–9 years
Anjue et al. [23]	China	2020	26	17	1–13 years
Qin et al. [24]	China	2020	68	40	0–10 years
Han et al. [25]	China	2020	7	4	< 18 years
Liu et al. [26]	China	2020	6	2	1–7 years
Cai et al. [27]	China	2020	10	4	3 months to 131 months
Wei et al. [7]	China	2020	9	2	3 months to 11 months
Xia et al. [28]	China	2020	20	13	< 18 years
Zhang et al. [29]	China	2020	4	3	30 hours to 17 days
Liu et al. [30]	China	2020	5	4	7 months to 13 years
Zheng et al. [31]	China	2020	3	3	Newborns
Rahimzadeh et al. [32]	Iran	2020	9	6	2–10 years
Li et al. [33]	China	2020	5	4	1–10 years
Bialek et al. [34]	United States	2020	291	165	< 18 years
Huanhuan et al. [35]	China	2020	4	2	2 months to 9 years
Li et al. [36]	China	2020	22	-	Pediatric patients
Chen et al. [37]	China	2020	31	13	0–17 years
Sun et al. [38]	China	2020	8	6	2 months to 15 years
Su et al. [39]	China	2020	9	3	11 months to 9 years
Zhu et al. [40]	China	2020	10	8	Neonates
Zheng et al. [41]	China	2020	25	14	1 month to 16 years
Shen et al. [42]	China	2020	9	3	1–12 years
Zhu et al. [43]	China	2020	10	5	1–17 years
Du et al. [44]	China	2020	14	6	Children
Xing et al. [45]	China	2020	3	2	1.5–6 years
Hu et al. [46]	China	2020	6	3	< 15 years