Figure 8. VEGF and peripheral neutrophil counts are higher in old COVID-19 patients.

Peripheral blood samples were obtained from a cohort of patients with laboratory-confirmed SARS-CoV-2 infection at hospital admission. Levels of different immune markers were determined by Luminex assay in plasma samples from COVID-19 and healthy volunteer controls. COVID-19 patients were stratified by age as younger than or older than 60 years. (A) Levels of IFN-γ and (B) levels of VEGF proteins were measured in plasma of COVID-19 and healthy controls. Peripheral neutrophil counts (C) and neutrophil to lymphocyte ratio (NLR) values (D) were retrieved from the medical records of COVID-19 patients and compared between age groups.