CD4 and bacterial infectious disease: Baseline median values of biomarkers investigated for their association with severe bacterial infection were: CD4 count 651 cells per μL (IQR 584–764); neutrophil count 2830 cells per μL (2149–3700); total lymphocyte count 2200 cells per μL (1830–2659); haemoglobin concentration 14·5 g/dL (13·4–15·3); platelet count 231 × 103 cells per μL (195 × 103 to 273 × 103); and albumin concentration 4·4 g/dL (4·1–4·6).