CRP and infection: At the same time, there were no differences in the distribution of infection indicators such as C-reactive protein(CRP), erythrocyte sedimentation rate (ESR), ferritin and D-dimer between the two groups, but the lactate dehydrogenase (LDH) level in the atopic group was higher than that in the non-atopic group, and the procalcitonin (PCT) was lower than that in the non-atopic group, and there were statistical differences between the two groups (P < 0.05).