MB and COVID-19: Furthermore, we found that laboratory biomarkers associated with the diagnosis and prognosis of COVID-19 patients, including glutamic oxaloacetic transaminase, serum creatinine, blood urea nitrogen, lactate dehydrogenase, creatine kinase, creatine kinase MB, myoglobin, and troponin I, were significantly higher in the eosinopenia group compared to the normal eosinophil group (23).