Serum Samples 44 Serum samples from 24 SARS patients for differential mapping of SARS associated biomarkers. 45 Serial serum samples from four additional SARS patients with comprehensive clinical follow-up for longitudinal correlation with clinical manifestation. 10 Sera from 10 apparently healthy individuals (from a familial cancer screening clinic) as normal controls. 72 Sera from 51 patients suffering from other viral or bacterial infections (influenza A virus [n = 12], influenza B virus [n = 8], respiratory adenovirus [n = 12], respiratory syncytial virus [n = 10], hepatitis B virus [n = 10], Mycobacterium tuberculosis [n = 10], other bacteria [n = 10]) as control patients for comparison with SARS patients.