Blood tests taken a few days later showed mild leukopenia (white blood cells 3060/mmc, neutrophils 1930/mmc, lymphocytes 770/mmc) and a slight elevation in C-reactive protein (CRP; 1.69 mg/dL, upper limit of normal [ULN] 0.5) and erythrocyte sedimentation rate (ESR; 34, ULN 20); IgMs were moderately reduced (26 mg/dL, lower limit of normal [LLN] 40), being IgG and IgA within normal limits (1040 and 442 mg/dL, respectively). Here, CRP is linked to Decreased total leukocyte count.