CD4 and COVID-19: Although there was no significant difference in terms of the leukocyte and lymphocyte counts between COVID-19 patients with and without cryptococcosis, patients with cryptococcosis had significantly lower CD4 cell counts than those without cryptococcosis (73.9 ± 68.9 cells/μL vs. 299 ± 316 cells/μL, p = 0.0242) [18].