CRP and COVID-19: A correlation was found between CRP and FVC (%) (r = −0.392, p = 0.048), 6MWT distance (r = −0.460, p = 0.01), dyspnea (Borg, after 6MWT) (r = 0.417, p = 0.03), and SGRQ total score (r = 0.465, p = 0.01), and between LDH and FVC (%) (r = −0.406, p = 0.04), 6MWT distance (r = −0.516, p = 0.007), and SGRQ total score (r = 0.442, p = 0.02) in the COVID-19 group.