Fig. 3From: Associations of immunological features with COVID-19 severity: a systematic review and meta-analysisa. CD3+ T cell. b. CD4+ T cell. c. CD8+ T cell. d. CD4+ / CD8+ ratio. e. Treg cell. f. B cell. g. NK cell. h. TNF-a. i. IFN-y. j. IL-2. k. IL-4. l. IL-5. m. IL-6. n. IL-10. o. GM-CSF. p. RANTES. q. MCP-1. r. IP-10. s. EotaxinBack to article page