Table 1.

Immune cell results from the included studies.

Study, year	COVID-19 positive	COVID-19 negative
	↓ Lymphocytes (percentage of patients)
Elshafeey et al.(Elshafeey et al., 2020)	14	–
Juan et al.(Juan et al., 2020)	43.1	–
Li et al.(Li et al., 2020)	12.5	12.6
Wu et al.(Wu et al., 2020)	12.5	0
	WBC Count
Elshafeey et al.(Elshafeey et al., 2020)	–	–
Juan et al.(Juan et al., 2020)	↓/Normal	–
Li et al.(Li et al., 2020)	Normal	↑
Wu et al.(Wu et al., 2020)	Normal	↑
	↑ CRP (percentage of patients)
Elshafeey et al.(Elshafeey et al., 2020)	18.7	–
Juan et al.(Juan et al., 2020)	45.7	–
Li et al.(Li et al., 2020)	32.1	58.1
Wu et al.(Wu et al., 2020)	0	0

Percentage of patients with: Low (↓), High (↑), or non-available data (-).

WBC: White blood cells.