CXCR5 and COVID-19: However, we found that the patients with acute COVID-19 had an increased level of CXCR5+ cell within CM and EM compared with healthy controls (6.35% (4.00; 11.83) vs. 3.22% (1.88; 4.67) and 1.60% (0.91; 2.69) vs. 0.85% (0.34; 1.37), p < 0.001 in both cases, respectively).