CXCL8 and severe acute respiratory syndrome: SARS patients with secondary Pseudomonas aeruginosa, invasive Aspergillus and Candida albicans infections demonstrated high levels of CXCL8 and CCL2 in blood when compared to SARS patients without secondary infections, suggesting this profile may have potential utility as a biomarker of superinfection (Jiang et al., 2005).