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Mass spectra of retention time version ion intensity for COVID-19-positive and COVID-19-recovered patient serum samples. Serum samples from COVID-19-positive and COVID-19-recovered patients were obtained and the serum metabolites were characterized using ultra-performance liquid chromatography mass spectrometry (UPLC-MS). Mass Spectra from (a) positive and (b) negative ion modes are represented as the initial quality check to identify individual metabolites.
