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Comparison of the complement proteins and cytokine/chemokine levels between critical COVID-19 patients who survived and those who did not survive. The serum samples were collected from the day of admission or day 14 during the intensive care unit (ICU)stay. (A) complement fragment C5a (P = 0.005); (B) complement fragment C3a (P < 0.001); (C) factor P (P < 0.001); (D) interleukin 1 β (IL-1β) (P = 0.01); (E) interleukin 6 (IL-6) (P = 0.02); (F) interleukin 8 (IL-8) (P = 0.001).
